{"id":15974,"date":"2024-07-25T12:10:56","date_gmt":"2024-07-25T08:40:56","guid":{"rendered":"https:\/\/www.itpiran.net\/blog\/?p=15974"},"modified":"2024-07-25T12:10:56","modified_gmt":"2024-07-25T08:40:56","slug":"how-to-work-with-dates-and-times-in-sql","status":"publish","type":"post","link":"https:\/\/www.itpiran.net\/blog\/ja\/tutorials\/how-to-work-with-dates-and-times-in-sql\/","title":{"rendered":"SQL\u3067\u65e5\u4ed8\u3068\u6642\u523b\u3092\u64cd\u4f5c\u3059\u308b\u65b9\u6cd5"},"content":{"rendered":"<h2 id=\"%d9%85%d9%82%d8%af%d9%85%d9%87\">\u5c0e\u5165<\/h2>\n<p>\u30ea\u30ec\u30fc\u30b7\u30e7\u30ca\u30eb\u30c7\u30fc\u30bf\u30d9\u30fc\u30b9\u3084\u69cb\u9020\u5316\u7167\u4f1a\u8a00\u8a9e\uff08SQL\uff09\u3092\u6271\u3046\u969b\u306b\u3001\u7279\u5b9a\u306e\u65e5\u4ed8\u3084\u6642\u523b\u3092\u8868\u3059\u5024\u3092\u64cd\u4f5c\u3059\u308b\u5fc5\u8981\u304c\u3042\u308b\u3053\u3068\u304c\u3042\u308a\u307e\u3059\u3002\u4f8b\u3048\u3070\u3001\u7279\u5b9a\u306e\u6d3b\u52d5\u306b\u8cbb\u3084\u3057\u305f\u5408\u8a08\u6642\u9593\u3092\u8a08\u7b97\u3057\u305f\u308a\u3001\u6570\u5b66\u6f14\u7b97\u5b50\u3084\u95a2\u6570\u3092\u7528\u3044\u3066\u65e5\u4ed8\u3084\u6642\u523b\u306e\u5024\u3092\u96c6\u8a08\u3057\u3001\u5408\u8a08\u5024\u3084\u5e73\u5747\u5024\u3092\u8a08\u7b97\u3057\u305f\u308a\u3059\u308b\u5fc5\u8981\u304c\u3042\u308b\u304b\u3082\u3057\u308c\u307e\u305b\u3093\u3002.<\/p>\n<p>\u3053\u306e\u30c1\u30e5\u30fc\u30c8\u30ea\u30a2\u30eb\u3067\u306f\u3001SQL\u3067\u65e5\u4ed8\u3068\u6642\u523b\u3092\u4f7f\u7528\u3059\u308b\u65b9\u6cd5\u3092\u5b66\u3073\u307e\u3059\u3002\u307e\u305a\u306fSELECT\u6587\u3060\u3051\u3067\u65e5\u4ed8\u3068\u6642\u523b\u3092\u6271\u3046\u8a08\u7b97\u3084\u69d8\u3005\u306a\u95a2\u6570\u306e\u4f7f\u3044\u65b9\u3092\u5b66\u3073\u307e\u3059\u3002\u6b21\u306b\u3001\u30b5\u30f3\u30d7\u30eb\u30c7\u30fc\u30bf\u306b\u5bfe\u3057\u3066\u30af\u30a8\u30ea\u3092\u5b9f\u884c\u3057\u3001CAST\u95a2\u6570\u3092\u5b9f\u88c5\u3057\u3066\u51fa\u529b\u3092\u5206\u304b\u308a\u3084\u3059\u304f\u3059\u308b\u65b9\u6cd5\u3092\u5b66\u3073\u307e\u3059\u3002.<\/p>\n<h5 id=\"%d9%be%db%8c%d8%b4-%d9%86%db%8c%d8%a7%d8%b2%d9%87%d8%a7\">\u524d\u63d0\u6761\u4ef6<\/h5>\n<p>\u3053\u306e\u30c1\u30e5\u30fc\u30c8\u30ea\u30a2\u30eb\u3092\u5b8c\u4e86\u3059\u308b\u306b\u306f\u3001\u6b21\u306e\u3082\u306e\u304c\u5fc5\u8981\u3067\u3059\u3002<\/p>\n<ul>\n<li>Ubuntu 20.04 \u3092\u5b9f\u884c\u3057\u3066\u3044\u308b\u30b5\u30fc\u30d0\u30fc\u3002sudo \u7ba1\u7406\u8005\u6a29\u9650\u3092\u6301\u3064\u975e root \u30e6\u30fc\u30b6\u30fc\u3068\u3001\u6709\u52b9\u306a\u30d5\u30a1\u30a4\u30a2\u30a6\u30a9\u30fc\u30eb\u3092\u5099\u3048\u3066\u3044\u307e\u3059\u3002.<\/li>\n<li>MySQL \u306f\u30b5\u30fc\u30d0\u30fc\u4e0a\u306b\u30a4\u30f3\u30b9\u30c8\u30fc\u30eb\u3055\u308c\u3001\u4fdd\u8b77\u3055\u308c\u3066\u3044\u307e\u3059\u3002.<\/li>\n<\/ul>\n<p><span style=\"color: #ff0000;\">\u6ce8\uff1a\u591a\u304f\u306e\u30ea\u30ec\u30fc\u30b7\u30e7\u30ca\u30eb\u30c7\u30fc\u30bf\u30d9\u30fc\u30b9\u7ba1\u7406\u30b7\u30b9\u30c6\u30e0\u306f\u72ec\u81ea\u306eSQL\u5b9f\u88c5\u3092\u4f7f\u7528\u3057\u3066\u3044\u308b\u3053\u3068\u306b\u3054\u6ce8\u610f\u304f\u3060\u3055\u3044\u3002\u3053\u306e\u30c1\u30e5\u30fc\u30c8\u30ea\u30a2\u30eb\u3067\u7d39\u4ecb\u3059\u308b\u30b3\u30de\u30f3\u30c9\u306f\u307b\u3068\u3093\u3069\u306eRDBMS\u3067\u52d5\u4f5c\u3057\u307e\u3059\u304c\u3001MySQL\u4ee5\u5916\u306e\u30b7\u30b9\u30c6\u30e0\u3067\u5b9f\u884c\u3057\u305f\u5834\u5408\u3001\u6b63\u78ba\u306a\u69cb\u6587\u3084\u51fa\u529b\u304c\u7570\u306a\u308b\u5834\u5408\u304c\u3042\u308a\u307e\u3059\u3002.<\/span><\/p>\n<p>\u3053\u306e\u30c1\u30e5\u30fc\u30c8\u30ea\u30a2\u30eb\u3067\u65e5\u4ed8\u3068\u6642\u523b\u306e\u4f7f\u3044\u65b9\u3092\u7df4\u7fd2\u3059\u308b\u306b\u306f\u3001\u30b5\u30f3\u30d7\u30eb\u30c7\u30fc\u30bf\u304c\u30ed\u30fc\u30c9\u3055\u308c\u305f\u30c7\u30fc\u30bf\u30d9\u30fc\u30b9\u3068\u30c6\u30fc\u30d6\u30eb\u304c\u5fc5\u8981\u3067\u3059\u3002\u30c7\u30fc\u30bf\u30d9\u30fc\u30b9\u3068\u30c6\u30fc\u30d6\u30eb\u304c\u307e\u3060\u7528\u610f\u3055\u308c\u3066\u3044\u306a\u3044\u5834\u5408\u306f\u3001\u300cMySQL\u3078\u306e\u63a5\u7d9a\u3068\u30b5\u30f3\u30d7\u30eb\u30c7\u30fc\u30bf\u30d9\u30fc\u30b9\u306e\u8a2d\u5b9a\u300d\u30bb\u30af\u30b7\u30e7\u30f3\u3092\u53c2\u7167\u3057\u3066\u3001\u30c7\u30fc\u30bf\u30d9\u30fc\u30b9\u3068\u30c6\u30fc\u30d6\u30eb\u306e\u4f5c\u6210\u65b9\u6cd5\u3092\u78ba\u8a8d\u3057\u3066\u304f\u3060\u3055\u3044\u3002\u3053\u306e\u30c1\u30e5\u30fc\u30c8\u30ea\u30a2\u30eb\u3067\u306f\u3001\u3053\u306e\u30b5\u30f3\u30d7\u30eb\u30c7\u30fc\u30bf\u30d9\u30fc\u30b9\u3068\u30c6\u30fc\u30d6\u30eb\u3092\u5168\u4f53\u3092\u901a\u3057\u3066\u53c2\u7167\u3057\u307e\u3059\u3002.<\/p>\n<h2 id=\"%d8%a7%d8%aa%d8%b5%d8%a7%d9%84-%d8%a8%d9%87-mysql-%d9%88-%d8%b1%d8%a7%d9%87-%d8%a7%d9%86%d8%af%d8%a7%d8%b2%db%8c-%db%8c%da%a9-%d9%be%d8%a7%db%8c%da%af%d8%a7%d9%87-%d8%af%d8%a7%d8%af%d9%87-%d9%86%d9%85\">MySQL\u3078\u306e\u63a5\u7d9a\u3068\u30b5\u30f3\u30d7\u30eb\u30c7\u30fc\u30bf\u30d9\u30fc\u30b9\u306e\u8a2d\u5b9a<\/h2>\n<p>SQL \u30c7\u30fc\u30bf\u30d9\u30fc\u30b9\u304c\u30ea\u30e2\u30fc\u30c8 \u30b5\u30fc\u30d0\u30fc\u4e0a\u3067\u5b9f\u884c\u3055\u308c\u3066\u3044\u308b\u5834\u5408\u306f\u3001\u30ed\u30fc\u30ab\u30eb \u30de\u30b7\u30f3\u304b\u3089\u30b5\u30fc\u30d0\u30fc\u306b SSH \u3067\u63a5\u7d9a\u3057\u307e\u3059\u3002<\/p>\n<div class=\"hcb_wrap\" data-no-translation=\"\" data-no-auto-translation=\"\">\n<pre class=\"prism line-numbers lang-bash\" data-lang=\"Bash\"><code>ssh sammy@your_server_ip\r\n<\/code><\/pre>\n<\/div>\n<p>\u6b21\u306b\u3001MySQL \u30d7\u30ed\u30f3\u30d7\u30c8\u3092\u958b\u304d\u3001Sami \u3092 MySQL \u30a2\u30ab\u30a6\u30f3\u30c8\u60c5\u5831\u306b\u7f6e\u304d\u63db\u3048\u307e\u3059\u3002<\/p>\n<div class=\"hcb_wrap\" data-no-translation=\"\" data-no-auto-translation=\"\">\n<pre class=\"prism line-numbers lang-sql\" data-lang=\"SQL\"><code>mysql -u sammy -p\r\n<\/code><\/pre>\n<\/div>\n<p>datetimeDB \u3068\u3044\u3046\u30c7\u30fc\u30bf\u30d9\u30fc\u30b9\u3092\u4f5c\u6210\u3057\u307e\u3059\u3002<\/p>\n<div class=\"hcb_wrap\" data-no-translation=\"\" data-no-auto-translation=\"\">\n<pre class=\"prism line-numbers lang-sql\" data-lang=\"SQL\"><code>CREATE DATABASE datetimeDB;\r\n<\/code><\/pre>\n<\/div>\n<p>\u30c7\u30fc\u30bf\u30d9\u30fc\u30b9\u304c\u6b63\u5e38\u306b\u4f5c\u6210\u3055\u308c\u308b\u3068\u3001\u6b21\u306e\u51fa\u529b\u304c\u8868\u793a\u3055\u308c\u307e\u3059\u3002<\/p>\n<div class=\"hcb_wrap\" data-no-translation=\"\" data-no-auto-translation=\"\">\n<pre class=\"prism line-numbers lang-plain\" data-lang=\"Plain Text\"><code>Output\r\nQuery OK, 1 row affected (0.01 sec)<\/code><\/pre>\n<\/div>\n<p>datetimeDB \u30c7\u30fc\u30bf\u30d9\u30fc\u30b9\u3092\u9078\u629e\u3059\u308b\u306b\u306f\u3001\u6b21\u306e USE \u30b9\u30c6\u30fc\u30c8\u30e1\u30f3\u30c8\u3092\u5b9f\u884c\u3057\u307e\u3059\u3002<\/p>\n<div class=\"hcb_wrap\" data-no-translation=\"\" data-no-auto-translation=\"\">\n<pre class=\"prism line-numbers lang-sql\" data-lang=\"SQL\"><code>USE datetimeDB;\r\n<\/code><\/pre>\n<\/div>\n<div class=\"hcb_wrap\" data-no-translation=\"\" data-no-auto-translation=\"\">\n<pre class=\"prism line-numbers lang-plain\" data-lang=\"Plain Text\"><code>Output\r\nDatabase changed<\/code><\/pre>\n<\/div>\n<p>\u30c7\u30fc\u30bf\u30d9\u30fc\u30b9\u3092\u9078\u629e\u3057\u305f\u3089\u3001\u305d\u306e\u4e2d\u306b\u30c6\u30fc\u30d6\u30eb\u3092\u4f5c\u6210\u3057\u307e\u3059\u3002\u3053\u306e\u30c1\u30e5\u30fc\u30c8\u30ea\u30a2\u30eb\u3067\u306f\u30012\u4eba\u306e\u30e9\u30f3\u30ca\u30fc\u304c1\u5e74\u9593\u306b\u8d70\u3063\u305f\u7570\u306a\u308b\u30ec\u30fc\u30b9\u306e\u7d50\u679c\u3092\u683c\u7d0d\u3059\u308b\u30c6\u30fc\u30d6\u30eb\u3092\u4f5c\u6210\u3057\u307e\u3059\u3002\u3053\u306e\u30c6\u30fc\u30d6\u30eb\u306b\u306f\u3001\u4ee5\u4e0b\u306e7\u3064\u306e\u5217\u304c\u3042\u308a\u307e\u3059\u3002<\/p>\n<ul>\n<li>race_id: int \u30c7\u30fc\u30bf\u578b\u306e\u5024\u3092\u8868\u3057\u3001\u30c6\u30fc\u30d6\u30eb\u306e\u4e3b\u30ad\u30fc\u3068\u3057\u3066\u6a5f\u80fd\u3057\u307e\u3059\u3002\u3064\u307e\u308a\u3001\u3053\u306e\u5217\u306e\u5404\u5024\u306f\u3001\u5bfe\u5fdc\u3059\u308b\u884c\u306e\u4e00\u610f\u306e\u8b58\u5225\u5b50\u3068\u3057\u3066\u6a5f\u80fd\u3057\u307e\u3059\u3002.<\/li>\n<li>runner_name: 2 \u4eba\u306e\u30e9\u30f3\u30ca\u30fc\u3001Bolt \u3068 Felix \u306e\u540d\u524d\u306b\u6700\u5927 30 \u6587\u5b57\u306e varchar \u30c7\u30fc\u30bf\u578b\u3092\u4f7f\u7528\u3057\u307e\u3059\u3002.<\/li>\n<li>race_name: \u6700\u5927 20 \u6587\u5b57\u306e varchar \u30c7\u30fc\u30bf\u578b\u306e\u30ec\u30fc\u30b9 \u30bf\u30a4\u30d7\u3092\u4fdd\u6301\u3057\u307e\u3059\u3002.<\/li>\n<li>start_day: DATE\u30c7\u30fc\u30bf\u578b\u3092\u4f7f\u7528\u3057\u3066\u3001\u5e74\u3001\u6708\u3001\u65e5\u306b\u57fa\u3065\u3044\u3066\u7279\u5b9a\u306e\u8a66\u5408\u306e\u65e5\u4ed8\u3092\u8ffd\u8de1\u3057\u307e\u3059\u3002\u3053\u306e\u30c7\u30fc\u30bf\u578b\u306f\u3001\u5e74\u30924\u6841\u3001\u6708\u3068\u65e5\u3092\u6700\u59272\u6841\uff08YYYY-MM-DD\uff09\u3067\u8868\u3057\u307e\u3059\u3002.<\/li>\n<li>start_time: \u8a66\u5408\u958b\u59cb\u6642\u523b\u3092TIME\u30c7\u30fc\u30bf\u578b\u3067\u8868\u3057\u3001\u6642\u3001\u5206\u3001\u79d2\uff08HH:MM:SS\uff09\u3067\u8868\u3057\u307e\u3059\u3002\u3053\u306e\u30c7\u30fc\u30bf\u578b\u306f24\u6642\u9593\u5236\u306b\u6e96\u62e0\u3057\u3066\u304a\u308a\u3001\u4f8b\u3048\u3070\u5348\u5f8c3\u6642\u3092\u8868\u3059\u5834\u5408\u306f15:00\u3068\u306a\u308a\u307e\u3059\u3002.<\/li>\n<li>total_miles: \u5404\u30ec\u30fc\u30b9\u306e\u7dcf\u8d70\u884c\u8ddd\u96e2\u306f\u6574\u6570\u3067\u306f\u306a\u3044\u3053\u3068\u304c\u591a\u3044\u305f\u3081\u3001\u5c0f\u6570\u70b9\u30c7\u30fc\u30bf\u578b\u3092\u4f7f\u7528\u3057\u3066\u8868\u793a\u3057\u307e\u3059\u3002\u3053\u306e\u5834\u5408\u3001\u5c0f\u6570\u70b9\u306f\u7cbe\u5ea63\u3001\u30b9\u30b1\u30fc\u30eb1\u3092\u6307\u5b9a\u3057\u307e\u3059\u3002\u3064\u307e\u308a\u3001\u3053\u306e\u5217\u306e\u5404\u5024\u306f3\u6841\u3067\u3001\u305d\u306e\u3046\u30611\u6841\u306f\u5c0f\u6570\u70b9\u306e\u53f3\u5074\u306b\u306a\u308a\u307e\u3059\u3002.<\/li>\n<li>end_time: TIMESTAMP\u30c7\u30fc\u30bf\u578b\u3092\u4f7f\u7528\u3057\u3066\u3001\u30ec\u30fc\u30b9\u7d42\u4e86\u6642\u306e\u30e9\u30f3\u30ca\u30fc\u306e\u30bf\u30a4\u30e0\u3092\u8ffd\u8de1\u3057\u307e\u3059\u3002\u3053\u306e\u30c7\u30fc\u30bf\u578b\u306f\u65e5\u4ed8\u3068\u6642\u523b\u3092\u6587\u5b57\u5217\u306b\u7d50\u5408\u3057\u3001\u5f62\u5f0f\u306fDATE\u3068TIME\u306e\u7d44\u307f\u5408\u308f\u305b\uff08YYYY-MM-DD HH:MM:SS\uff09\u3067\u3059\u3002.<\/li>\n<\/ul>\n<p>CREATE TABLE \u30b3\u30de\u30f3\u30c9\u3092\u5b9f\u884c\u3057\u3066\u30c6\u30fc\u30d6\u30eb\u3092\u4f5c\u6210\u3057\u307e\u3059\u3002<\/p>\n<div class=\"hcb_wrap\" data-no-translation=\"\" data-no-auto-translation=\"\">\n<pre class=\"prism line-numbers lang-sql\" data-lang=\"SQL\"><code>CREATE TABLE race_results (\r\nrace_id int, \r\nrunner_name varchar(30),\r\nrace_name varchar(20), \r\nstart_day DATE,\r\nstart_time TIME, \r\ntotal_miles decimal(3, 1),\r\nend_time TIMESTAMP,\r\nPRIMARY KEY (race_id)\r\n); <\/code><\/pre>\n<\/div>\n<p>\u6b21\u306b\u3001\u7a7a\u306e\u30c6\u30fc\u30d6\u30eb\u306b\u30b5\u30f3\u30d7\u30eb \u30c7\u30fc\u30bf\u3092\u5165\u529b\u3057\u307e\u3059\u3002<\/p>\n<div class=\"hcb_wrap\" data-no-translation=\"\" data-no-auto-translation=\"\">\n<pre class=\"prism line-numbers lang-sql\" data-lang=\"SQL\"><code>INSERT INTO race_results\r\n(race_id, runner_name, race_name, start_day, start_time, total_miles, end_time)\r\nVALUES\r\n(1, 'bolt', '1600_meters', '2022-09-18', '7:00:00', 1.0, '2022-09-18 7:06:30'),\r\n(2, 'bolt', '5K', '2022-10-19', '11:00:00', 3.1, '2022-10-19 11:22:31'),\r\n(3, 'bolt', '10K', '2022-11-20', '10:00:00', 6.2, '2022-11-20 10:38:05'),\r\n(4, 'bolt', 'half_marathon', '2022-12-21', '6:00:00', 13.1, '2022-12-21 07:39:04'),\r\n(5, 'bolt', 'full_marathon', '2023-01-22', '8:00:00', 26.2, '2023-01-22 11:23:10'),\r\n(6, 'felix', '1600_meters', '2022-09-18', '7:00:00', 1.0, '2022-09-18 7:07:15'),\r\n(7, 'felix', '5K', '2022-10-19', '11:00:00', 3.1, '2022-10-19 11:30:50'),\r\n(8, 'felix', '10K', '2022-11-20', '10:00:00', 6.2, '2022-11-20 11:10:17'),\r\n(9, 'felix', 'half_marathon', '2022-12-21', '6:00:00', 13.1, '2022-12-21 08:11:57'),\r\n(10, 'felix', 'full_marathon', '2023-01-22', '8:00:00', 26.2, '2023-01-22 12:02:10');<\/code><\/pre>\n<\/div>\n<div class=\"hcb_wrap\" data-no-translation=\"\" data-no-auto-translation=\"\">\n<pre class=\"prism line-numbers lang-plain\" data-lang=\"Plain Text\"><code>Output\r\nQuery OK, 10 rows affected (0.00 sec)\r\nRecords: 10 Duplicates: 0 Warnings: 0<\/code><\/pre>\n<\/div>\n<p>\u30c7\u30fc\u30bf\u3092\u5165\u529b\u3059\u308b\u3068\u3001SQL \u3067\u65e5\u4ed8\u3068\u6642\u523b\u3092\u4f7f\u3063\u305f\u7b97\u8853\u6f14\u7b97\u3068\u95a2\u6570\u306e\u7df4\u7fd2\u3092\u59cb\u3081\u308b\u6e96\u5099\u304c\u6574\u3044\u307e\u3059\u3002.<\/p>\n<h2 id=\"%d8%a7%d8%b3%d8%aa%d9%81%d8%a7%d8%af%d9%87-%d8%a7%d8%b2-%d8%ad%d8%b3%d8%a7%d8%a8-%d8%a8%d8%a7-%d8%aa%d8%a7%d8%b1%db%8c%d8%ae-%d9%88-%d8%b2%d9%85%d8%a7%d9%86\">\u65e5\u4ed8\u3068\u6642\u523b\u3067\u30a2\u30ab\u30a6\u30f3\u30c8\u3092\u4f7f\u7528\u3059\u308b<\/h2>\n<p>SQL\u3067\u306f\u3001\u6570\u5f0f\u3092\u4f7f\u3063\u3066\u65e5\u4ed8\u3068\u6642\u523b\u306e\u5024\u3092\u64cd\u4f5c\u3067\u304d\u307e\u3059\u3002\u5fc5\u8981\u306a\u306e\u306f\u3001\u6570\u5f0f\u6f14\u7b97\u5b50\u3068\u8a08\u7b97\u3057\u305f\u3044\u5024\u3060\u3051\u3067\u3059\u3002.<\/p>\n<p>\u4f8b\u3048\u3070\u3001\u3042\u308b\u65e5\u4ed8\u304b\u3089\u6307\u5b9a\u3057\u305f\u65e5\u6570\u5f8c\u306e\u65e5\u4ed8\u3092\u691c\u7d22\u3057\u305f\u3044\u3068\u3057\u307e\u3059\u3002\u6b21\u306e\u30af\u30a8\u30ea\u306f\u3001\u65e5\u4ed8\u5024\uff082022-10-05\uff09\u306b17\u3092\u52a0\u7b97\u3057\u3001\u30af\u30a8\u30ea\u3067\u6307\u5b9a\u3057\u305f\u65e5\u4ed8\u304b\u308917\u65e5\u5f8c\u306e\u65e5\u4ed8\u5024\u3092\u8fd4\u3057\u307e\u3059\u3002\u3053\u306e\u4f8b\u3067\u306f\u3001DBMS\u304c\u6587\u5b57\u5217\u3084\u305d\u306e\u4ed6\u306e\u30c7\u30fc\u30bf\u578b\u3068\u3057\u3066\u89e3\u91c8\u3057\u306a\u3044\u3088\u3046\u306b\u3001DATE\u5024\u3068\u3057\u30662022-10-05\u3092\u6307\u5b9a\u3057\u3066\u3044\u308b\u3053\u3068\u306b\u6ce8\u610f\u3057\u3066\u304f\u3060\u3055\u3044\u3002<\/p>\n<div class=\"hcb_wrap\" data-no-translation=\"\" data-no-auto-translation=\"\">\n<pre class=\"prism line-numbers lang-sql\" data-lang=\"SQL\"><code>SELECT DATE '2022-10-05' + 17 AS new_date;\r\n<\/code><\/pre>\n<\/div>\n<div class=\"hcb_wrap\" data-no-translation=\"\" data-no-auto-translation=\"\">\n<pre class=\"prism line-numbers lang-plain\" data-lang=\"Plain Text\"><code>Output\r\n+----------+\r\n| new_date |\r\n+----------+\r\n| 20221022 |\r\n+----------+\r\n1 row in set (0.01 sec)<\/code><\/pre>\n<\/div>\n<p>\u3053\u306e\u51fa\u529b\u304c\u793a\u3059\u3088\u3046\u306b\u30012022-10-05 \u306e 17 \u65e5\u5f8c\u304c 2022-10-22\u3001\u3064\u307e\u308a 2022 \u5e74 10 \u6708 22 \u65e5\u306b\u306a\u308a\u307e\u3059\u3002.<\/p>\n<p>\u5225\u306e\u4f8b\u3068\u3057\u3066\u30012\u3064\u306e\u7570\u306a\u308b\u6642\u523b\u9593\u306e\u5408\u8a08\u6642\u9593\u3092\u8a08\u7b97\u3057\u305f\u3044\u3068\u3057\u307e\u3059\u3002\u3053\u308c\u306f\u30012\u3064\u306e\u6642\u523b\u3092\u6e1b\u7b97\u3059\u308b\u3053\u3068\u3067\u884c\u3048\u307e\u3059\u3002\u6b21\u306e\u30af\u30a8\u30ea\u3067\u306f\u30011\u3064\u76ee\u306e\u6642\u523b\u5024\u306f11:00\u30012\u3064\u76ee\u306e\u6642\u523b\u5024\u306f3:00\u3067\u3059\u3002\u5dee\u3092\u6642\u9593\u5358\u4f4d\u3067\u8fd4\u3059\u306b\u306f\u3001\u4e21\u65b9\u306e\u5024\u304cTIME\u5024\u3067\u3042\u308b\u3053\u3068\u3092\u6307\u5b9a\u3059\u308b\u5fc5\u8981\u304c\u3042\u308a\u307e\u3059\u3002<\/p>\n<div class=\"hcb_wrap\" data-no-translation=\"\" data-no-auto-translation=\"\">\n<pre class=\"prism line-numbers lang-sql\" data-lang=\"SQL\"><code>SELECT TIME '11:00' - TIME '3:00' AS time_diff;\r\n<\/code><\/pre>\n<\/div>\n<div class=\"hcb_wrap\" data-no-translation=\"\" data-no-auto-translation=\"\">\n<pre class=\"prism line-numbers lang-plain\" data-lang=\"Plain Text\"><code>Output\r\n+-----------+\r\n| time_diff |\r\n+-----------+\r\n| 80000 |\r\n+-----------+\r\n1 row in set (0.00 sec)<\/code><\/pre>\n<\/div>\n<p>\u3053\u306e\u51fa\u529b\u306f\u300111:00 \u3068 3:00 \u306e\u5dee\u304c 80,000\u3001\u3064\u307e\u308a 8 \u6642\u9593\u3067\u3042\u308b\u3053\u3068\u3092\u793a\u3057\u3066\u3044\u307e\u3059\u3002.<\/p>\n<p>\u30b5\u30f3\u30d7\u30eb\u30c7\u30fc\u30bf\u306e\u65e5\u4ed8\u3068\u6642\u523b\u60c5\u5831\u3092\u4f7f\u3063\u3066\u8a08\u7b97\u3092\u7df4\u7fd2\u3057\u3066\u307f\u307e\u3057\u3087\u3046\u3002\u6700\u521d\u306e\u30af\u30a8\u30ea\u3067\u306f\u3001start_time\u304b\u3089end_time\u3092\u5f15\u3044\u3066\u3001\u5404\u30ec\u30fc\u30b9\u306e\u30e9\u30f3\u30ca\u30fc\u304c\u5b8c\u8d70\u3059\u308b\u307e\u3067\u306b\u304b\u304b\u3063\u305f\u5408\u8a08\u6642\u9593\u3092\u8a08\u7b97\u3057\u307e\u3059\u3002<\/p>\n<div class=\"hcb_wrap\" data-no-translation=\"\" data-no-auto-translation=\"\">\n<pre class=\"prism line-numbers lang-sql\" data-lang=\"SQL\"><code>SELECT runner_name, race_name, end_time - start_time \r\nAS total_time \r\nFROM race_results;<\/code><\/pre>\n<\/div>\n<div class=\"hcb_wrap\" data-no-translation=\"\" data-no-auto-translation=\"\">\n<pre class=\"prism line-numbers lang-plain\" data-lang=\"Plain Text\"><code>Output\r\n+-------------+---------------+----------------+\r\n| runner_name | race_name | total_time |\r\n+-------------+---------------+----------------+\r\n| bolt | 1600_meters | 20220918000630 |\r\n| bolt | 5K | 20221019002231 |\r\n| bolt | 10K | 20221120003805 |\r\n| bolt | half_marathon | 20221221013904 |\r\n| bolt | full_marathon | 20230122032310 |\r\n| felix | 1600_meters | 20220918000715 |\r\n| felix | 5K | 20221019003050 |\r\n| felix | 10K | 20221120011017 |\r\n| felix | half_marathon | 20221221021157 |\r\n| felix | full_marathon | 20230122040210 |\r\n+-------------+---------------+----------------+\r\n10 rows in set (0.00 sec)<\/code><\/pre>\n<\/div>\n<p>total_time\u5217\u306e\u51fa\u529b\u306f\u975e\u5e38\u306b\u9577\u304f\u3001\u8aad\u307f\u306b\u304f\u3044\u3053\u3068\u306b\u304a\u6c17\u3065\u304d\u3067\u3057\u3087\u3046\u3002\u6b21\u306b\u3001CAST\u95a2\u6570\u3092\u4f7f\u3063\u3066\u3053\u308c\u3089\u306e\u30c7\u30fc\u30bf\u5024\u3092\u5909\u63db\u3057\u3001\u8aad\u307f\u3084\u3059\u304f\u3059\u308b\u65b9\u6cd5\u3092\u8aac\u660e\u3057\u307e\u3059\u3002.<\/p>\n<p>\u3055\u3066\u3001\u30cf\u30fc\u30d5\u30de\u30e9\u30bd\u30f3\u3084\u30d5\u30eb\u30de\u30e9\u30bd\u30f3\u3068\u3044\u3063\u305f\u9577\u8ddd\u96e2\u30ec\u30fc\u30b9\u306b\u304a\u3051\u308b\u5404\u30e9\u30f3\u30ca\u30fc\u306e\u30d1\u30d5\u30a9\u30fc\u30de\u30f3\u30b9\u306e\u307f\u306b\u95a2\u5fc3\u304c\u3042\u308b\u5834\u5408\u306f\u3001\u30c7\u30fc\u30bf\u306b\u30af\u30a8\u30ea\u3092\u5b9f\u884c\u3057\u3066\u305d\u306e\u60c5\u5831\u3092\u53d6\u5f97\u3067\u304d\u307e\u3059\u3002\u3053\u306e\u30af\u30a8\u30ea\u3067\u306f\u3001start_time\u304b\u3089end_time\u3092\u6e1b\u7b97\u3057\u3001WHERE\u53e5\u3092\u4f7f\u7528\u3057\u3066\u7d50\u679c\u3092\u7d5e\u308a\u8fbc\u307f\u3001total_miles\u304c12\u3088\u308a\u5927\u304d\u3044\u30c7\u30fc\u30bf\u3092\u53d6\u5f97\u3057\u307e\u3059\u3002<\/p>\n<div class=\"hcb_wrap\" data-no-translation=\"\" data-no-auto-translation=\"\">\n<pre class=\"prism line-numbers lang-sql\" data-lang=\"SQL\"><code>SELECT runner_name, race_name, end_time - start_time AS half_full_results\r\nFROM race_results \r\nWHERE total_miles &gt; 12;<\/code><\/pre>\n<\/div>\n<div class=\"hcb_wrap\" data-no-translation=\"\" data-no-auto-translation=\"\">\n<pre class=\"prism line-numbers lang-plain\" data-lang=\"Plain Text\"><code>Output\r\n+-------------+---------------+-------------------+\r\n| runner_name | race_name | half_full_results |\r\n+-------------+---------------+-------------------+\r\n| bolt | half_marathon | 20221221013904 |\r\n| bolt | full_marathon | 20230122032310 |\r\n| felix | half_marathon | 20221221021157 |\r\n| felix | full_marathon | 20230122040210 |\r\n+-------------+---------------+-------------------+\r\n4 rows in set (0.00 sec)<\/code><\/pre>\n<\/div>\n<p>\u3053\u306e\u30bb\u30af\u30b7\u30e7\u30f3\u3067\u306f\u3001SELECT\u6587\u3092\u7528\u3044\u3066\u3001\u30b5\u30f3\u30d7\u30eb\u30c7\u30fc\u30bf\u3092\u7528\u3044\u305f\u5b9f\u7528\u7684\u306a\u65e5\u4ed8\u3068\u6642\u523b\u306e\u8a08\u7b97\u3092\u3044\u304f\u3064\u304b\u5b9f\u884c\u3057\u307e\u3057\u305f\u3002\u6b21\u306b\u3001\u69d8\u3005\u306a\u65e5\u4ed8\u3068\u6642\u523b\u306e\u95a2\u6570\u3092\u7528\u3044\u305f\u30af\u30a8\u30ea\u3092\u7df4\u7fd2\u3057\u307e\u3059\u3002.<\/p>\n<h2 id=\"%d8%a7%d8%b3%d8%aa%d9%81%d8%a7%d8%af%d9%87-%d8%a7%d8%b2-%d8%aa%d9%88%d8%a7%d8%a8%d8%b9-%d8%aa%d8%a7%d8%b1%db%8c%d8%ae-%d9%88-%d8%b2%d9%85%d8%a7%d9%86-%d9%88-%d8%b9%d8%a8%d8%a7%d8%b1%d8%a7%d8%aa-%d8%a8\">\u65e5\u4ed8\u3068\u6642\u523b\u306e\u95a2\u6570\u3068\u7bc4\u56f2\u5f0f\u306e\u4f7f\u7528<\/h2>\n<p>SQL\u306b\u306f\u3001\u65e5\u4ed8\u3068\u6642\u523b\u306e\u5024\u3092\u691c\u7d22\u3057\u305f\u308a\u64cd\u4f5c\u3057\u305f\u308a\u3059\u308b\u305f\u3081\u306b\u4f7f\u7528\u3067\u304d\u308b\u95a2\u6570\u304c\u3044\u304f\u3064\u304b\u3042\u308a\u307e\u3059\u3002SQL\u95a2\u6570\u306f\u901a\u5e38\u3001\u30c7\u30fc\u30bf\u306e\u51e6\u7406\u3084\u64cd\u4f5c\u306b\u4f7f\u7528\u3055\u308c\u3001\u4f7f\u7528\u3067\u304d\u308b\u95a2\u6570\u306fSQL\u306e\u5b9f\u88c5\u306b\u3088\u3063\u3066\u7570\u306a\u308a\u307e\u3059\u3002\u305f\u3060\u3057\u3001\u307b\u3068\u3093\u3069\u306eSQL\u5b9f\u88c5\u3067\u306f\u3001current_date\u3068current_time\u306e\u5024\u3092\u30af\u30a8\u30ea\u3059\u308b\u3053\u3068\u3067\u3001\u73fe\u5728\u306e\u65e5\u4ed8\u3068\u6642\u523b\u3092\u53d6\u5f97\u3067\u304d\u307e\u3059\u3002.<\/p>\n<p>\u305f\u3068\u3048\u3070\u3001\u4eca\u65e5\u306e\u65e5\u4ed8\u3092\u898b\u3064\u3051\u308b\u5834\u5408\u3001\u69cb\u6587\u306f\u77ed\u304f\u3001\u6b21\u306e\u3088\u3046\u306b SELECT \u30b9\u30c6\u30fc\u30c8\u30e1\u30f3\u30c8\u3068 current_date \u95a2\u6570\u3060\u3051\u3067\u69cb\u6210\u3055\u308c\u307e\u3059\u3002<\/p>\n<div class=\"hcb_wrap\" data-no-translation=\"\" data-no-auto-translation=\"\">\n<pre class=\"prism line-numbers lang-sql\" data-lang=\"SQL\"><code>SELECT current_date;\r\n<\/code><\/pre>\n<\/div>\n<div class=\"hcb_wrap\" data-no-translation=\"\" data-no-auto-translation=\"\">\n<pre class=\"prism line-numbers lang-plain\" data-lang=\"Plain Text\"><code>Output\r\n+--------------+\r\n| current_date |\r\n+--------------+\r\n| 2022-02-15 |\r\n+--------------+\r\n1 row in set (0.00 sec)<\/code><\/pre>\n<\/div>\n<p>\u540c\u3058\u69cb\u6587\u3092\u4f7f\u7528\u3057\u3066\u3001current_time \u95a2\u6570\u3067\u73fe\u5728\u306e\u6642\u523b\u3092\u898b\u3064\u3051\u308b\u3053\u3068\u304c\u3067\u304d\u307e\u3059\u3002<\/p>\n<div class=\"hcb_wrap\" data-no-translation=\"\" data-no-auto-translation=\"\">\n<pre class=\"prism line-numbers lang-sql\" data-lang=\"SQL\"><code>SELECT current_time;\r\n<\/code><\/pre>\n<\/div>\n<div class=\"hcb_wrap\" data-no-translation=\"\" data-no-auto-translation=\"\">\n<pre class=\"prism line-numbers lang-plain\" data-lang=\"Plain Text\"><code>Output\r\n+--------------+\r\n| current_time |\r\n+--------------+\r\n| 17:10:20 |\r\n+--------------+\r\n1 row in set (0.00 sec)<\/code><\/pre>\n<\/div>\n<p>\u51fa\u529b\u5185\u306e\u65e5\u4ed8\u3068\u6642\u523b\u3092\u7167\u4f1a\u3057\u305f\u3044\u5834\u5408\u306f\u3001current_timestamp \u95a2\u6570\u3092\u4f7f\u7528\u3057\u307e\u3059\u3002<\/p>\n<div class=\"hcb_wrap\" data-no-translation=\"\" data-no-auto-translation=\"\">\n<pre class=\"prism line-numbers lang-sql\" data-lang=\"SQL\"><code>SELECT current_timestamp;\r\n<\/code><\/pre>\n<\/div>\n<div class=\"hcb_wrap\" data-no-translation=\"\" data-no-auto-translation=\"\">\n<pre class=\"prism line-numbers lang-plain\" data-lang=\"Plain Text\"><code>Output\r\n+---------------------+\r\n| current_timestamp |\r\n+---------------------+\r\n| 2022-02-15 19:09:58 |\r\n+---------------------+\r\n1 row in set (0.00 sec)<\/code><\/pre>\n<\/div>\n<p>\u524d\u306e\u30bb\u30af\u30b7\u30e7\u30f3\u3068\u540c\u69d8\u306b\u3001\u3053\u308c\u3089\u306e\u65e5\u4ed8\u3068\u6642\u523b\u306e\u95a2\u6570\u306f\u7b97\u8853\u95a2\u6570\u3067\u3082\u4f7f\u7528\u3067\u304d\u307e\u3059\u3002\u4f8b\u3048\u3070\u3001\u4eca\u65e5\u304b\u308911\u65e5\u524d\u306e\u65e5\u4ed8\u3092\u77e5\u308a\u305f\u3044\u3068\u3057\u307e\u3059\u3002\u3053\u306e\u5834\u5408\u3001current_date\u95a2\u6570\u306e\u30af\u30a8\u30ea\u3068\u540c\u3058\u69cb\u6587\u3092\u4f7f\u7528\u3057\u3001\u305d\u3053\u304b\u308911\u3092\u5f15\u304f\u3053\u3068\u306711\u65e5\u524d\u306e\u65e5\u4ed8\u3092\u898b\u3064\u3051\u308b\u3053\u3068\u304c\u3067\u304d\u307e\u3059\u3002<\/p>\n<div class=\"hcb_wrap\" data-no-translation=\"\" data-no-auto-translation=\"\">\n<pre class=\"prism line-numbers lang-sql\" data-lang=\"SQL\"><code>SELECT current_date - 11;\r\n<\/code><\/pre>\n<\/div>\n<div class=\"hcb_wrap\" data-no-translation=\"\" data-no-auto-translation=\"\">\n<pre class=\"prism line-numbers lang-plain\" data-lang=\"Plain Text\"><code>Output\r\n+-------------------+\r\n| current_date - 11 |\r\n+-------------------+\r\n| 20220206 |\r\n+-------------------+\r\n1 row in set (0.01 sec)<\/code><\/pre>\n<\/div>\n<p>\u3053\u306e\u51fa\u529b\u304c\u793a\u3059\u3088\u3046\u306b\u3001current_date \u306e 11 \u65e5\u524d (\u3053\u306e\u8a18\u4e8b\u306e\u57f7\u7b46\u6642\u70b9) \u306f 2022-02-06\u3001\u3064\u307e\u308a 2022 \u5e74 2 \u6708 6 \u65e5\u3067\u3057\u305f\u3002\u4eca\u5ea6\u306f\u540c\u3058\u64cd\u4f5c\u3092\u8a66\u3057\u3066\u307f\u307e\u3059\u304c\u3001current_date \u3092 current_time \u95a2\u6570\u306b\u7f6e\u304d\u63db\u3048\u307e\u3059\u3002<\/p>\n<div class=\"hcb_wrap\" data-no-translation=\"\" data-no-auto-translation=\"\">\n<pre class=\"prism line-numbers lang-sql\" data-lang=\"SQL\"><code>SELECT current_time - 11;\r\n<\/code><\/pre>\n<\/div>\n<div class=\"hcb_wrap\" data-no-translation=\"\" data-no-auto-translation=\"\">\n<pre class=\"prism line-numbers lang-plain\" data-lang=\"Plain Text\"><code>Output\r\n+-------------------+\r\n| current_time - 11 |\r\n+-------------------+\r\n| 233639 |\r\n+-------------------+\r\n1 row in set (0.00 sec)<\/code><\/pre>\n<\/div>\n<p>\u3053\u306e\u51fa\u529b\u306f\u3001current_time\u5024\u304b\u308911\u3092\u5f15\u304f\u306811\u79d2\u304c\u6e1b\u7b97\u3055\u308c\u308b\u3053\u3068\u3092\u793a\u3057\u3066\u3044\u307e\u3059\u3002\u5148\u307b\u3069current_date\u95a2\u6570\u3092\u4f7f\u3063\u3066\u884c\u3063\u305f\u64cd\u4f5c\u3067\u306f\u300111\u306f\u79d2\u3067\u306f\u306a\u304f\u65e5\u6570\u3068\u3057\u3066\u89e3\u91c8\u3055\u308c\u3066\u3044\u307e\u3057\u305f\u3002\u6570\u5024\u306e\u89e3\u91c8\u65b9\u6cd5\u306b\u304a\u3051\u308b\u3053\u306e\u4e0d\u4e00\u81f4\u306f\u3001\u65e5\u4ed8\u3068\u6642\u523b\u306e\u95a2\u6570\u3092\u6271\u3046\u969b\u306b\u6df7\u4e71\u3092\u62db\u304f\u53ef\u80fd\u6027\u304c\u3042\u308a\u307e\u3059\u3002\u591a\u304f\u306e\u30c7\u30fc\u30bf\u30d9\u30fc\u30b9\u7ba1\u7406\u30b7\u30b9\u30c6\u30e0\u3067\u306f\u3001\u3053\u306e\u3088\u3046\u306a\u8a08\u7b97\u3092\u7528\u3044\u3066\u65e5\u4ed8\u3068\u6642\u523b\u306e\u5024\u3092\u64cd\u4f5c\u3059\u308b\u306e\u3067\u306f\u306a\u304f\u3001INTERVAL\u30b9\u30c6\u30fc\u30c8\u30e1\u30f3\u30c8\u3092\u7528\u3044\u3066\u3088\u308a\u660e\u793a\u7684\u306b\u64cd\u4f5c\u3067\u304d\u307e\u3059\u3002.<\/p>\n<p>INTERVAL\u5f0f\u3092\u4f7f\u7528\u3059\u308b\u3068\u3001\u65e5\u4ed8\u307e\u305f\u306f\u6642\u523b\u5f0f\u304b\u3089\u6307\u5b9a\u3057\u305f\u9593\u9694\u306e\u524d\u307e\u305f\u306f\u5f8c\u306e\u65e5\u4ed8\u307e\u305f\u306f\u6642\u523b\u3092\u6307\u5b9a\u3067\u304d\u307e\u3059\u3002INTERVAL\u5f0f\u306f\u4ee5\u4e0b\u306e\u5f62\u5f0f\u3067\u8a18\u8ff0\u3059\u308b\u5fc5\u8981\u304c\u3042\u308a\u307e\u3059\u3002<\/p>\n<div class=\"hcb_wrap\" data-no-translation=\"\" data-no-auto-translation=\"\">\n<pre class=\"prism line-numbers lang-plain\" data-lang=\"Plain Text\"><code>INTERVAL value unit\r\n<\/code><\/pre>\n<\/div>\n<p>\u305f\u3068\u3048\u3070\u3001\u4eca\u304b\u3089 5 \u65e5\u5f8c\u306e\u65e5\u4ed8\u3092\u691c\u7d22\u3059\u308b\u306b\u306f\u3001\u6b21\u306e\u30af\u30a8\u30ea\u3092\u5b9f\u884c\u3057\u307e\u3059\u3002<\/p>\n<div class=\"hcb_wrap\" data-no-translation=\"\" data-no-auto-translation=\"\">\n<pre class=\"prism line-numbers lang-sql\" data-lang=\"SQL\"><code>SELECT current_date + INTERVAL '5' DAY AS \"5_days_from_today\";\r\n<\/code><\/pre>\n<\/div>\n<p>\u3053\u306e\u4f8b\u3067\u306f\u3001current_date\u306e\u5024\u3092\u53d6\u5f97\u3057\u3001\u305d\u308c\u306b\u9593\u9694\u5f0fINTERVAL &#039;5&#039; DAY\u3092\u52a0\u7b97\u3057\u307e\u3059\u3002\u3053\u308c\u306b\u3088\u308a\u30015\u65e5\u5f8c\u306e\u65e5\u4ed8\u304c\u8fd4\u3055\u308c\u307e\u3059\u3002<\/p>\n<div class=\"hcb_wrap\" data-no-translation=\"\" data-no-auto-translation=\"\">\n<pre class=\"prism line-numbers lang-plain\" data-lang=\"Plain Text\"><code>Output\r\n+-------------------+\r\n| 5_days_from_today |\r\n+-------------------+\r\n| 2022-03-06 |\r\n+-------------------+\r\n1 row in set (0.00 sec)<\/code><\/pre>\n<\/div>\n<p>\u3053\u308c\u306f\u3001\u540c\u4e00\u3067\u306f\u306a\u3044\u3082\u306e\u306e\u540c\u69d8\u306e\u51fa\u529b\u3092\u751f\u6210\u3059\u308b\u6b21\u306e\u30af\u30a8\u30ea\u3088\u308a\u3082\u306f\u308b\u304b\u306b\u660e\u78ba\u3067\u3059\u3002<\/p>\n<div class=\"hcb_wrap\" data-no-translation=\"\" data-no-auto-translation=\"\">\n<pre class=\"prism line-numbers lang-sql\" data-lang=\"SQL\"><code>SELECT current_date + 5 AS \"5_days_from_today\";\r\n<\/code><\/pre>\n<\/div>\n<div class=\"hcb_wrap\" data-no-translation=\"\" data-no-auto-translation=\"\">\n<pre class=\"prism line-numbers lang-plain\" data-lang=\"Plain Text\"><code>Output\r\n+-------------------+\r\n| 5_days_from_today |\r\n+-------------------+\r\n| 20220306 |\r\n+-------------------+\r\n1 row in set (0.00 sec)<\/code><\/pre>\n<\/div>\n<p>\u6307\u5b9a\u3057\u305f\u65e5\u4ed8\u306e\u5024\u3088\u308a\u524d\u306e\u5024\u3092\u898b\u3064\u3051\u308b\u305f\u3081\u306b\u3001\u65e5\u4ed8\u307e\u305f\u306f\u6642\u523b\u304b\u3089\u6642\u9593\u9593\u9694\u3092\u6e1b\u7b97\u3067\u304d\u308b\u3053\u3068\u306b\u6ce8\u610f\u3057\u3066\u304f\u3060\u3055\u3044\u3002<\/p>\n<div class=\"hcb_wrap\" data-no-translation=\"\" data-no-auto-translation=\"\">\n<pre class=\"prism line-numbers lang-sql\" data-lang=\"SQL\"><code>SELECT current_date - INTERVAL '7' MONTH AS \"7_months_ago\";\r\n<\/code><\/pre>\n<\/div>\n<div class=\"hcb_wrap\" data-no-translation=\"\" data-no-auto-translation=\"\">\n<pre class=\"prism line-numbers lang-plain\" data-lang=\"Plain Text\"><code>Output\r\n+--------------+\r\n| 7_months_ago |\r\n+--------------+\r\n| 2021-08-01 |\r\n+--------------+\r\n1 row in set (0.00 sec)<\/code><\/pre>\n<\/div>\n<p>INTERVAL \u30b9\u30c6\u30fc\u30c8\u30e1\u30f3\u30c8\u3067\u4f7f\u7528\u3067\u304d\u308b\u5358\u4f4d\u306f\u9078\u629e\u3057\u305f DBMS \u306b\u3088\u3063\u3066\u7570\u306a\u308a\u307e\u3059\u304c\u3001\u307b\u3068\u3093\u3069\u306e DBMS \u306b\u306f HOUR\u3001MINUTE\u3001SECOND \u306a\u3069\u306e\u30aa\u30d7\u30b7\u30e7\u30f3\u304c\u3042\u308a\u307e\u3059\u3002<\/p>\n<div class=\"hcb_wrap\" data-no-translation=\"\" data-no-auto-translation=\"\">\n<pre class=\"prism line-numbers lang-sql\" data-lang=\"SQL\"><code>SELECT current_time + INTERVAL '6' HOUR AS \"6_hours_from_now\",\r\ncurrent_time - INTERVAL '5' MINUTE AS \"5_minutes_ago\",\r\ncurrent_time + INTERVAL '20' SECOND AS \"20_seconds_from_now\";<\/code><\/pre>\n<\/div>\n<div class=\"hcb_wrap\" data-no-translation=\"\" data-no-auto-translation=\"\">\n<pre class=\"prism line-numbers lang-plain\" data-lang=\"Plain Text\"><code>Output\r\n+------------------+---------------+---------------------+\r\n| 6_hours_from_now | 5_minutes_ago | 20_seconds_from_now |\r\n+------------------+---------------+---------------------+\r\n| 07:51:43 | 01:46:43 | 01:52:03.000000 |\r\n+------------------+---------------+---------------------+\r\n1 row in set (0.00 sec)<\/code><\/pre>\n<\/div>\n<p>\u9593\u9694\u5f0f\u3068\u3044\u304f\u3064\u304b\u306e\u65e5\u4ed8\u3068\u6642\u523b\u306e\u95a2\u6570\u306b\u3064\u3044\u3066\u5b66\u7fd2\u3057\u305f\u306e\u3067\u3001\u6700\u521d\u306e\u624b\u9806\u3067\u5165\u529b\u3057\u305f\u30b5\u30f3\u30d7\u30eb \u30c7\u30fc\u30bf\u306e\u64cd\u4f5c\u3092\u7df4\u7fd2\u3057\u7d9a\u3051\u307e\u3059\u3002.<\/p>\n<h2 id=\"%d8%a7%d8%b3%d8%aa%d9%81%d8%a7%d8%af%d9%87-%d8%a7%d8%b2-%d8%aa%d9%88%d8%a7%d8%a8%d8%b9-cast-%d9%88-aggregate-%d8%a8%d8%a7-%d8%aa%d8%a7%d8%b1%db%8c%d8%ae-%d9%88-%d8%b2%d9%85%d8%a7%d9%86\">\u65e5\u4ed8\u3068\u6642\u523b\u3067CAST\u95a2\u6570\u3068\u96c6\u8a08\u95a2\u6570\u3092\u4f7f\u7528\u3059\u308b<\/h2>\n<p>\u300c\u65e5\u4ed8\u3068\u6642\u523b\u306e\u7b97\u8853\u6f14\u7b97\u306e\u4f7f\u7528\u300d\u30bb\u30af\u30b7\u30e7\u30f3\u306e3\u756a\u76ee\u306e\u4f8b\u3092\u601d\u3044\u51fa\u3057\u3066\u304f\u3060\u3055\u3044\u3002\u6b21\u306e\u30af\u30a8\u30ea\u3092\u5b9f\u884c\u3057\u3066\u3001start_time\u304b\u3089end_time\u3092\u6e1b\u7b97\u3057\u3001\u5404\u30e9\u30f3\u30ca\u30fc\u304c\u5404\u30ec\u30fc\u30b9\u3067\u8d70\u3063\u305f\u5408\u8a08\u6642\u9593\u3092\u8a08\u7b97\u3057\u307e\u3057\u305f\u3002\u3057\u304b\u3057\u3001\u51fa\u529b\u306f\u30c6\u30fc\u30d6\u30eb\u306b\u8a2d\u5b9a\u3055\u308c\u305fTIMESTAMP\u30c7\u30fc\u30bf\u578b\u306b\u5f93\u3063\u305f\u975e\u5e38\u306b\u9577\u3044\u5217\u306b\u306a\u308a\u307e\u3057\u305f\u3002<\/p>\n<div class=\"hcb_wrap\" data-no-translation=\"\" data-no-auto-translation=\"\">\n<pre class=\"prism line-numbers lang-sql\" data-lang=\"SQL\"><code>SELECT runner_name, race_name, end_time - start_time \r\nAS total_time \r\nFROM race_results;<\/code><\/pre>\n<\/div>\n<div class=\"hcb_wrap\" data-no-translation=\"\" data-no-auto-translation=\"\">\n<pre class=\"prism line-numbers lang-plain\" data-lang=\"Plain Text\"><code>Output\r\n+-------------+---------------+----------------+\r\n| runner_name | race_name | total_time |\r\n+-------------+---------------+----------------+\r\n| bolt | 1600_meters | 20220918000630 |\r\n| bolt | 5K | 20221019002231 |\r\n| bolt | 10K | 20221120003805 |\r\n| bolt | half_marathon | 20221221013904 |\r\n| bolt | full_marathon | 20230122032310 |\r\n| felix | 1600_meters | 20220918000715 |\r\n| felix | 5K | 20221019003050 |\r\n| felix | 10K | 20221120011017 |\r\n| felix | half_marathon | 20221221021157 |\r\n| felix | full_marathon | 20230122040210 |\r\n+-------------+---------------+----------------+\r\n10 rows in set (0.00 sec)<\/code><\/pre>\n<\/div>\n<p>\u7570\u306a\u308b\u30c7\u30fc\u30bf\u578b\u3092\u6301\u30642\u3064\u306e\u5217\uff08end_time\u306fTIMESTAMP\u5024\u3092\u4fdd\u6301\u3057\u3001start_time\u306fTIME\u5024\u3092\u4fdd\u6301\uff09\u306b\u5bfe\u3057\u3066\u64cd\u4f5c\u3092\u5b9f\u884c\u3057\u3066\u3044\u308b\u305f\u3081\u3001\u30c7\u30fc\u30bf\u30d9\u30fc\u30b9\u306f\u64cd\u4f5c\u7d50\u679c\u3092\u51fa\u529b\u3059\u308b\u969b\u306b\u3069\u306e\u30c7\u30fc\u30bf\u578b\u3092\u4f7f\u7528\u3059\u3079\u304d\u304b\u5224\u65ad\u3067\u304d\u307e\u305b\u3093\u3002\u4ee3\u308f\u308a\u306b\u3001\u64cd\u4f5c\u3092\u5b9f\u884c\u3059\u308b\u305f\u3081\u306b\u4e21\u65b9\u306e\u5024\u3092\u6574\u6570\u306b\u5909\u63db\u3057\u3001total_time\u5217\u306b\u9577\u3044\u6570\u5024\u304c\u51fa\u529b\u3055\u308c\u307e\u3059\u3002.<\/p>\n<p>\u3053\u306e\u30c7\u30fc\u30bf\u3092\u3088\u308a\u660e\u78ba\u306b\u8aad\u307f\u53d6\u308a\u3001\u89e3\u91c8\u3059\u308b\u305f\u3081\u306b\u3001CAST\u95a2\u6570\u3092\u4f7f\u7528\u3057\u3066\u3053\u308c\u3089\u306e\u9577\u6574\u6570\u5024\u3092TIME\u30c7\u30fc\u30bf\u578b\u306b\u5909\u63db\u3067\u304d\u307e\u3059\u3002\u3053\u308c\u3092\u884c\u3046\u306b\u306f\u3001CAST\u95a2\u6570\u3067\u958b\u59cb\u3057\u3001\u305d\u306e\u76f4\u5f8c\u306b\u958b\u304d\u62ec\u5f27\u3001\u5909\u63db\u3057\u305f\u3044\u5024\u3001\u305d\u3057\u3066AS\u30ad\u30fc\u30ef\u30fc\u30c9\u3068\u5909\u63db\u5f8c\u306e\u30c7\u30fc\u30bf\u578b\u3092\u7d9a\u3051\u307e\u3059\u3002.<\/p>\n<p>\u6b21\u306e\u30af\u30a8\u30ea\u306f\u524d\u306e\u4f8b\u3068\u540c\u3058\u3067\u3059\u304c\u3001CAST \u95a2\u6570\u3092\u4f7f\u7528\u3057\u3066 total_time \u5217\u3092\u6642\u9593\u30c7\u30fc\u30bf\u578b\u306b\u5909\u63db\u3057\u307e\u3059\u3002<\/p>\n<div class=\"hcb_wrap\" data-no-translation=\"\" data-no-auto-translation=\"\">\n<pre class=\"prism line-numbers lang-sql\" data-lang=\"SQL\"><code>SELECT runner_name, race_name, CAST(end_time - start_time AS time)\r\nAS total_time \r\nFROM race_results;<\/code><\/pre>\n<\/div>\n<div class=\"hcb_wrap\" data-no-translation=\"\" data-no-auto-translation=\"\">\n<pre class=\"prism line-numbers lang-plain\" data-lang=\"Plain Text\"><code>Output\r\n+-------------+---------------+------------+\r\n| runner_name | race_name | total_time |\r\n+-------------+---------------+------------+\r\n| bolt | 1600_meters | 00:06:30 |\r\n| bolt | 5K | 00:22:31 |\r\n| bolt | 10K | 00:38:05 |\r\n| bolt | half_marathon | 01:39:04 |\r\n| bolt | full_marathon | 03:23:10 |\r\n| felix | 1600_meters | 00:07:15 |\r\n| felix | 5K | 00:30:50 |\r\n| felix | 10K | 01:10:17 |\r\n| felix | half_marathon | 02:11:57 |\r\n| felix | full_marathon | 04:02:10 |\r\n+-------------+---------------+------------+\r\n10 rows in set (0.00 sec)<\/code><\/pre>\n<\/div>\n<p>CAST \u306f\u3053\u306e\u51fa\u529b\u306e\u30c7\u30fc\u30bf\u5024\u3092 TIME \u306b\u5909\u63db\u3057\u3001\u975e\u5e38\u306b\u8aad\u307f\u3084\u3059\u304f\u7406\u89e3\u3057\u3084\u3059\u304f\u3057\u307e\u3057\u305f\u3002.<\/p>\n<p>\u305d\u308c\u3067\u306f\u3001CAST\u95a2\u6570\u3068\u7d44\u307f\u5408\u308f\u305b\u3066\u96c6\u8a08\u95a2\u6570\u3092\u4f7f\u7528\u3057\u3001\u5404\u30e9\u30f3\u30ca\u30fc\u306e\u6700\u77ed\u3001\u6700\u9577\u3001\u5408\u8a08\u30bf\u30a4\u30e0\u3092\u8abf\u3079\u3066\u307f\u307e\u3057\u3087\u3046\u3002\u307e\u305a\u3001MIN\u95a2\u6570\u3067\u6700\u5c0f\uff08\u307e\u305f\u306f\u6700\u77ed\uff09\u30bf\u30a4\u30e0\u3092\u691c\u7d22\u3057\u307e\u3059\u3002\u3053\u3053\u3067\u3082\u3001\u308f\u304b\u308a\u3084\u3059\u304f\u3059\u308b\u305f\u3081\u306b\u3001TIMESTAMP\u30c7\u30fc\u30bf\u5024\u3092TIME\u30c7\u30fc\u30bf\u5024\u306b\u5909\u63db\u3059\u308b\u306b\u306fCAST\u3092\u4f7f\u7528\u3057\u307e\u3059\u3002\u3053\u306e\u4f8b\u306e\u3088\u3046\u306b2\u3064\u306e\u95a2\u6570\u3092\u4f7f\u7528\u3059\u308b\u5834\u5408\u306f\u3001\u62ec\u5f27\u30922\u7d44\u4f7f\u7528\u3057\u3001\u5408\u8a08\u6642\u9593\uff08end_time - start_time\uff09\u306e\u8a08\u7b97\u3092\u305d\u306e\u3046\u3061\u306e1\u3064\u306b\u914d\u7f6e\u3059\u308b\u5fc5\u8981\u304c\u3042\u308b\u3053\u3068\u306b\u6ce8\u610f\u3057\u3066\u304f\u3060\u3055\u3044\u3002\u6700\u5f8c\u306b\u3001GROUP BY\u53e5\u3092\u8ffd\u52a0\u3057\u3066\u3001\u3053\u308c\u3089\u306e\u5024\u3092runner_name\u5217\u3067\u6574\u7406\u3057\u3001\u30e9\u30f3\u30ca\u30fc\u306e\u30ec\u30fc\u30b9\u7d50\u679c\u51fa\u529b\u3092\u8868\u793a\u3057\u307e\u3059\u3002<\/p>\n<div class=\"hcb_wrap\" data-no-translation=\"\" data-no-auto-translation=\"\">\n<pre class=\"prism line-numbers lang-sql\" data-lang=\"SQL\"><code>SELECT runner_name, MIN(CAST(end_time - start_time AS time)) AS min_time\r\nFROM race_results GROUP BY runner_name;<\/code><\/pre>\n<\/div>\n<div class=\"hcb_wrap\" data-no-translation=\"\" data-no-auto-translation=\"\">\n<pre class=\"prism line-numbers lang-plain\" data-lang=\"Plain Text\"><code>Output\r\n+-------------+----------+\r\n| runner_name | min_time |\r\n+-------------+----------+\r\n| bolt | 00:06:30 |\r\n| felix | 00:07:15 |\r\n+-------------+----------+\r\n2 rows in set (0.00 sec)<\/code><\/pre>\n<\/div>\n<p>\u3053\u306e\u51fa\u529b\u306f\u30e9\u30f3\u30ca\u30fc\u306e\u6700\u77ed\u6642\u9593\u3092\u793a\u3057\u3066\u304a\u308a\u3001\u3053\u306e\u5834\u5408\u3001\u30dc\u30eb\u30c8\u306e\u5834\u5408\u306f\u5c11\u306a\u304f\u3068\u3082 6 \u5206 30 \u79d2\u3001\u30d5\u30a7\u30ea\u30c3\u30af\u30b9\u306e\u5834\u5408\u306f 7 \u5206 15 \u79d2\u3067\u3059\u3002.<\/p>\n<p>\u6b21\u306b\u3001\u5404\u30e9\u30f3\u30ca\u30fc\u306e\u6700\u9577\u5b9f\u884c\u6642\u9593\u3092\u8abf\u3079\u307e\u3059\u3002\u524d\u306e\u30b9\u30c6\u30fc\u30c8\u30e1\u30f3\u30c8\u3068\u540c\u3058\u69cb\u6587\u3092\u4f7f\u7528\u3067\u304d\u307e\u3059\u304c\u3001\u4eca\u56de\u306fMIN\u3092MAX\u306b\u7f6e\u304d\u63db\u3048\u307e\u3059\u3002<\/p>\n<div class=\"hcb_wrap\" data-no-translation=\"\" data-no-auto-translation=\"\">\n<pre class=\"prism line-numbers lang-sql\" data-lang=\"SQL\"><code>SELECT runner_name, MAX(CAST(end_time - start_time AS time)) AS max_time\r\nFROM race_results GROUP BY runner_name;<\/code><\/pre>\n<\/div>\n<div class=\"hcb_wrap\" data-no-translation=\"\" data-no-auto-translation=\"\">\n<pre class=\"prism line-numbers lang-plain\" data-lang=\"Plain Text\"><code>Output\r\n+-------------+----------+\r\n| runner_name | max_time |\r\n+-------------+----------+\r\n| bolt | 03:23:10 |\r\n| felix | 04:02:10 |\r\n+-------------+----------+\r\n2 rows in set (0.00 sec)<\/code><\/pre>\n<\/div>\n<p>\u3053\u306e\u51fa\u529b\u304b\u3089\u3001\u30dc\u30eb\u30c8\u306e\u6700\u9577\u8d70\u884c\u30bf\u30a4\u30e0\u306f\u5408\u8a083\u6642\u959323\u520610\u79d2\u3060\u3063\u305f\u3053\u3068\u304c\u308f\u304b\u308a\u307e\u3059\u3002\u4e00\u65b9\u3001\u30d5\u30a7\u30ea\u30c3\u30af\u30b9\u306f\u5408\u8a084\u6642\u95932\u520610\u79d2\u3067\u3057\u305f\u3002.<\/p>\n<p>\u305d\u308c\u3067\u306f\u3001\u5404\u30e9\u30f3\u30ca\u30fc\u306e\u30e9\u30f3\u30cb\u30f3\u30b0\u6642\u9593\u5408\u8a08\u306b\u95a2\u3059\u308b\u9ad8\u30ec\u30d9\u30eb\u60c5\u5831\u3092\u30af\u30a8\u30ea\u3057\u3066\u307f\u307e\u3057\u3087\u3046\u3002\u3053\u306e\u30af\u30a8\u30ea\u3067\u306f\u3001SUM\u95a2\u6570\u3092\u4f7f\u3063\u3066end_time - start_time\u306b\u57fa\u3065\u3044\u3066\u5408\u8a08\u6642\u9593\u3092\u6c42\u3081\u3001CAST\u3092\u4f7f\u3063\u3066\u3053\u308c\u3089\u306e\u30c7\u30fc\u30bf\u5024\u3092TIME\u306b\u5909\u63db\u3057\u307e\u3059\u3002\u5404\u30e9\u30f3\u30ca\u30fc\u306e\u7d50\u679c\u5024\u3092\u6574\u7406\u3059\u308b\u305f\u3081\u306b\u3001GROUP BY\u53e5\u3092\u8ffd\u52a0\u3059\u308b\u3053\u3068\u3092\u5fd8\u308c\u306a\u3044\u3067\u304f\u3060\u3055\u3044\u3002<\/p>\n<div class=\"hcb_wrap\" data-no-translation=\"\" data-no-auto-translation=\"\">\n<pre class=\"prism line-numbers lang-sql\" data-lang=\"SQL\"><code>SELECT runner_name, SUM(CAST(end_time - start_time AS time))\r\nAS total_hours FROM race_results GROUP BY runner_name;<\/code><\/pre>\n<\/div>\n<div class=\"hcb_wrap\" data-no-translation=\"\" data-no-auto-translation=\"\">\n<pre class=\"prism line-numbers lang-plain\" data-lang=\"Plain Text\"><code>Output\r\n+-------------+-------------+\r\n| runner_name | total_hours |\r\n+-------------+-------------+\r\n| bolt | 52880 |\r\n| felix | 76149 |\r\n+-------------+-------------+\r\n2 rows in set (0.00 sec)<\/code><\/pre>\n<\/div>\n<p>\u8208\u5473\u6df1\u3044\u3053\u3068\u306b\u3001\u3053\u306e\u51fa\u529b\u306fMySQL\u304c\u5408\u8a08\u6642\u9593\u3092\u6574\u6570\u3068\u3057\u3066\u89e3\u91c8\u3057\u3066\u3044\u308b\u3053\u3068\u3092\u793a\u3057\u3066\u3044\u307e\u3059\u3002\u3053\u308c\u3089\u306e\u7d50\u679c\u3092\u6642\u9593\u3068\u3057\u3066\u8aad\u307f\u53d6\u308b\u3068\u3001\u30dc\u30eb\u30c8\u306e\u5408\u8a08\u6642\u9593\u306f5\u6642\u959328\u520680\u79d2\u306b\u5206\u5272\u3055\u308c\u307e\u3059\u3002\u307e\u305f\u3001\u30d5\u30a7\u30ea\u30c3\u30af\u30b9\u306e\u6642\u9593\u306f7\u6642\u959361\u520649\u79d2\u306b\u5206\u5272\u3055\u308c\u307e\u3059\u3002\u3054\u89a7\u306e\u3068\u304a\u308a\u3001\u3053\u308c\u306f\u8ad6\u7406\u7684\u306a\u6642\u9593\u306e\u5185\u8a33\u3067\u306f\u306a\u304f\u3001\u6642\u9593\u3067\u306f\u306a\u304f\u6574\u6570\u3068\u3057\u3066\u8a08\u7b97\u3055\u308c\u3066\u3044\u308b\u3053\u3068\u3092\u793a\u3057\u3066\u3044\u307e\u3059\u3002\u4f8b\u3048\u3070\u3001PostgreSQL\u306a\u3069\u306e\u5225\u306eDBMS\u3067\u540c\u3058\u30af\u30a8\u30ea\u3092\u5b9f\u884c\u3059\u308b\u3068\u3001\u7d50\u679c\u306f\u5c11\u3057\u7570\u306a\u308a\u307e\u3059\u3002<\/p>\n<div class=\"hcb_wrap\" data-no-translation=\"\" data-no-auto-translation=\"\">\n<pre class=\"prism line-numbers lang-plain\" data-lang=\"Plain Text\"><code>SELECT runner_name, SUM(CAST(end_time - start_time AS time))\r\nAS total_hours FROM race_results GROUP BY runner_name;<\/code><\/pre>\n<\/div>\n<div class=\"hcb_wrap\" data-no-translation=\"\" data-no-auto-translation=\"\">\n<pre class=\"prism line-numbers lang-plain\" data-lang=\"Plain Text\"><code>Output\r\nrunner_name | total_hours\r\n-------------+-------------\r\nfelix | 10:01:44\r\nbolt | 06:09:20\r\n(2 rows)<\/code><\/pre>\n<\/div>\n<p>\u3053\u306e\u5834\u5408\u3001PostgreSQL\u306e\u30af\u30a8\u30ea\u306f\u5024\u3092\u6642\u9593\u3068\u3057\u3066\u89e3\u91c8\u3057\u3001\u305d\u306e\u3088\u3046\u306b\u8a08\u7b97\u3059\u308b\u305f\u3081\u3001Felix\u306e\u7d50\u679c\u306f\u5408\u8a0810\u6642\u95931\u520644\u79d2\u306b\u5206\u5272\u3055\u308c\u307e\u3059\u3002\u4e00\u65b9\u3001Bolt\u306e\u5834\u5408\u306f6\u6642\u95939\u520620\u79d2\u3067\u3059\u3002\u3053\u308c\u306f\u3001\u540c\u3058\u30af\u30a8\u30ea\u3068\u30c7\u30fc\u30bf\u30bb\u30c3\u30c8\u3092\u4f7f\u7528\u3057\u3066\u3044\u3066\u3082\u3001\u7570\u306a\u308bDBMS\u5b9f\u88c5\u3067\u306f\u30c7\u30fc\u30bf\u5024\u306e\u89e3\u91c8\u304c\u7570\u306a\u308b\u5834\u5408\u304c\u3042\u308b\u3053\u3068\u3092\u793a\u3059\u4f8b\u3067\u3059\u3002.<\/p>\n<h2 id=\"%d9%86%d8%aa%db%8c%d8%ac%d9%87\">\u7d50\u679c<\/h2>\n<p>SQL\u3067\u65e5\u4ed8\u3068\u6642\u523b\u306e\u4f7f\u3044\u65b9\u3092\u7406\u89e3\u3057\u3066\u304a\u304f\u3068\u3001\u5206\u3001\u79d2\u3001\u6642\u9593\u3001\u65e5\u3001\u6708\u3001\u5e74\u306a\u3069\u3001\u7279\u5b9a\u306e\u65e5\u4ed8\u3084\u6642\u523b\u306e\u7d44\u307f\u5408\u308f\u305b\u3092\u691c\u7d22\u3059\u308b\u3068\u304d\u306b\u5f79\u7acb\u3061\u307e\u3059\u3002\u3055\u3089\u306b\u3001\u65e5\u4ed8\u3068\u6642\u523b\u7528\u306e\u95a2\u6570\u3082\u6570\u591a\u304f\u7528\u610f\u3055\u308c\u3066\u304a\u308a\u3001\u73fe\u5728\u306e\u65e5\u4ed8\u3084\u6642\u523b\u306a\u3069\u3001\u7279\u5b9a\u306e\u5024\u3092\u7c21\u5358\u306b\u898b\u3064\u3051\u308b\u3053\u3068\u304c\u3067\u304d\u307e\u3059\u3002\u3053\u306e\u30c1\u30e5\u30fc\u30c8\u30ea\u30a2\u30eb\u3067\u306f\u3001SQL\u306b\u304a\u3051\u308b\u65e5\u4ed8\u3068\u6642\u523b\u306e\u52a0\u7b97\u3068\u6e1b\u7b97\u306e\u8a08\u7b97\u306b\u3064\u3044\u3066\u306e\u307f\u8aac\u660e\u3057\u307e\u3059\u304c\u3001\u65e5\u4ed8\u3068\u6642\u523b\u306e\u5024\u306f\u4efb\u610f\u306e\u6570\u5f0f\u3067\u4f7f\u7528\u3067\u304d\u307e\u3059\u3002\u6570\u5f0f\u3068\u52a0\u7b97\u95a2\u6570\u306b\u95a2\u3059\u308b\u30ac\u30a4\u30c9\u3067\u8a73\u7d30\u3092\u5b66\u3073\u3001\u65e5\u4ed8\u3068\u6642\u523b\u306e\u691c\u7d22\u3067\u8a66\u3057\u3066\u307f\u3066\u304f\u3060\u3055\u3044\u3002.<\/p>","protected":false},"excerpt":{"rendered":"\u306f\u3058\u3081\u306b 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