{"id":15984,"date":"2024-07-29T14:27:12","date_gmt":"2024-07-29T10:57:12","guid":{"rendered":"https:\/\/www.itpiran.net\/blog\/?p=15984"},"modified":"2024-07-29T14:27:12","modified_gmt":"2024-07-29T10:57:12","slug":"how-to-use-primary-keys-in-sql","status":"publish","type":"post","link":"https:\/\/www.itpiran.net\/blog\/zh\/tutorials\/how-to-use-primary-keys-in-sql\/","title":{"rendered":"\u5982\u4f55\u5728 SQL \u4e2d\u4f7f\u7528\u4e3b\u952e"},"content":{"rendered":"<h2 id=\"%d9%85%d9%82%d8%af%d9%85%d9%87\">\u4ecb\u7ecd<\/h2>\n<p>\u5173\u7cfb\u578b\u6570\u636e\u5e93\u7684\u4e00\u5927\u4f18\u52bf\u5728\u4e8e\u5176\u6570\u636e\u7ed3\u6784\u6e05\u6670\u3001\u683c\u5f0f\u89c4\u8303\u3002\u8fd9\u79cd\u7ed3\u6784\u662f\u901a\u8fc7\u4f7f\u7528\u5177\u6709\u56fa\u5b9a\u5217\u7684\u8868\u3001\u9075\u5faa\u660e\u786e\u5b9a\u4e49\u7684\u6570\u636e\u7c7b\u578b\u4ee5\u53ca\u786e\u4fdd\u6bcf\u884c\u6570\u636e\u683c\u5f0f\u4e00\u81f4\u6765\u5b9e\u73b0\u7684\u3002\u5c06\u6570\u636e\u4ee5\u884c\u7684\u5f62\u5f0f\u5b58\u50a8\u5728\u8868\u4e2d\u65f6\uff0c\u80fd\u591f\u660e\u786e\u5730\u67e5\u627e\u548c\u5f15\u7528\u8fd9\u4e9b\u6570\u636e\u540c\u6837\u81f3\u5173\u91cd\u8981\u3002\u5728\u7ed3\u6784\u5316\u67e5\u8be2\u8bed\u8a00 (SQL) \u4e2d\uff0c\u8fd9\u53ef\u4ee5\u901a\u8fc7\u4e3b\u952e\u6765\u5b9e\u73b0\uff0c\u4e3b\u952e\u5145\u5f53\u5173\u7cfb\u578b\u6570\u636e\u5e93\u8868\u4e2d\u6bcf\u884c\u6570\u636e\u7684\u6807\u8bc6\u7b26\u3002.<\/p>\n<p>\u5728\u672c\u6559\u7a0b\u4e2d\uff0c\u60a8\u5c06\u5b66\u4e60\u4e3b\u952e\uff0c\u5e76\u4f7f\u7528\u51e0\u79cd\u4e0d\u540c\u7c7b\u578b\u7684\u4e3b\u952e\u6765\u6807\u8bc6\u6570\u636e\u5e93\u8868\u4e2d\u7684\u552f\u4e00\u884c\u3002\u60a8\u5c06\u4f7f\u7528\u4e00\u4e9b\u793a\u4f8b\u6570\u636e\u96c6\uff0c\u521b\u5efa\u5355\u5217\u4e3b\u952e\u3001\u591a\u5217\u4e3b\u952e\u548c\u81ea\u589e\u987a\u5e8f\u4e3b\u952e\u3002.<\/p>\n<h5 id=\"%d9%be%db%8c%d8%b4-%d9%86%db%8c%d8%a7%d8%b2%d9%87%d8%a7\">\u5148\u51b3\u6761\u4ef6<\/h5>\n<p>\u8981\u9075\u5faa\u672c\u6307\u5357\uff0c\u60a8\u9700\u8981\u4e00\u53f0\u8fd0\u884c\u57fa\u4e8e SQL \u7684\u5173\u7cfb\u6570\u636e\u5e93\u7ba1\u7406\u7cfb\u7edf (RDBMS) \u7684\u8ba1\u7b97\u673a\u3002\u672c\u6307\u5357\u4e2d\u7684\u8bf4\u660e\u548c\u793a\u4f8b\u5df2\u5728\u4ee5\u4e0b\u73af\u5883\u4e2d\u9a8c\u8bc1\uff1a<\/p>\n<ul>\n<li>\u670d\u52a1\u5668\u8fd0\u884cUbuntu 20.04\uff0c\u6709\u4e00\u4e2a\u5177\u6709\u7ba1\u7406\u5458\u6743\u9650\u7684\u975eroot\u7528\u6237\uff0c\u5e76\u4e14\u914d\u7f6e\u4e86UFW\u9632\u706b\u5899\u3002<\/li>\n<li>\u670d\u52a1\u5668\u4e0a\u5df2\u5b89\u88c5\u5e76\u914d\u7f6e\u4e86 MySQL \u5b89\u5168\u63aa\u65bd\u3002<\/li>\n<li>\u6267\u884c SELECT \u67e5\u8be2\u4ece\u6570\u636e\u5e93\u4e2d\u68c0\u7d22\u6570\u636e\u7684\u57fa\u672c\u4ecb\u7ecd<\/li>\n<\/ul>\n<p><span style=\"color: #ff0000;\">\u6ce8\u610f\uff1a\u8bb8\u591a\u5173\u7cfb\u6570\u636e\u5e93\u7ba1\u7406\u7cfb\u7edf (RDBMS) \u4f7f\u7528\u5404\u81ea\u72ec\u7279\u7684 SQL \u5b9e\u73b0\u3002\u867d\u7136\u672c\u6559\u7a0b\u4e2d\u63d0\u5230\u7684\u547d\u4ee4\u9002\u7528\u4e8e\u5927\u591a\u6570 RDBMS\uff0c\u5e76\u4e14\u4e3b\u952e\u662f SQL \u6807\u51c6\u7684\u4e00\u90e8\u5206\uff0c\u4f46\u67d0\u4e9b\u529f\u80fd\u662f\u6570\u636e\u5e93\u7279\u6709\u7684\uff0c\u56e0\u6b64\u5982\u679c\u60a8\u5728 MySQL \u4ee5\u5916\u7684\u7cfb\u7edf\u4e0a\u6d4b\u8bd5\u8fd9\u4e9b\u547d\u4ee4\uff0c\u5219\u5177\u4f53\u7684\u8bed\u6cd5\u6216\u8f93\u51fa\u53ef\u80fd\u4f1a\u6709\u6240\u4e0d\u540c\u3002.<\/span><\/p>\n<p>\u60a8\u8fd8\u9700\u8981\u4e00\u4e2a\u7a7a\u6570\u636e\u5e93\uff0c\u7528\u4e8e\u521b\u5efa\u5e26\u6709\u4e3b\u952e\u7684\u8868\u3002\u6211\u4eec\u5efa\u8bae\u60a8\u53c2\u8003\u4e0b\u6587\u201c\u8fde\u63a5\u5230 MySQL \u5e76\u8bbe\u7f6e\u793a\u4f8b\u6570\u636e\u5e93\u201d\u90e8\u5206\uff0c\u4e86\u89e3\u5982\u4f55\u8fde\u63a5\u5230 MySQL \u670d\u52a1\u5668\u4ee5\u53ca\u521b\u5efa\u672c\u6307\u5357\u793a\u4f8b\u4e2d\u4f7f\u7528\u7684\u6d4b\u8bd5\u6570\u636e\u5e93\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\">\u8fde\u63a5\u5230 MySQL \u5e76\u8bbe\u7f6e\u793a\u4f8b\u6570\u636e\u5e93<\/h2>\n<p>\u5728\u672c\u8282\u4e2d\uff0c\u60a8\u5c06\u8fde\u63a5\u5230 MySQL \u670d\u52a1\u5668\u5e76\u521b\u5efa\u4e00\u4e2a\u6570\u636e\u5e93\u5b9e\u4f8b\uff0c\u4ee5\u4fbf\u60a8\u53ef\u4ee5\u4f7f\u7528\u672c\u6307\u5357\u4e2d\u7684\u793a\u4f8b\u3002.<\/p>\n<p>\u5982\u679c\u60a8\u7684 SQL \u6570\u636e\u5e93\u7cfb\u7edf\u8fd0\u884c\u5728\u8fdc\u7a0b\u670d\u52a1\u5668\u4e0a\uff0c\u8bf7\u4ece\u672c\u5730\u8ba1\u7b97\u673a\u901a\u8fc7 SSH \u8fde\u63a5\u5230\u60a8\u7684\u670d\u52a1\u5668\uff1a<\/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<\/code><\/pre>\n<\/div>\n<p>\u7136\u540e\u6253\u5f00 MySQL \u670d\u52a1\u5668\u63d0\u793a\u7b26\uff0c\u5e76\u5c06 Sami \u66ff\u6362\u4e3a\u60a8\u7684 MySQL \u7528\u6237\u540d\uff1a<\/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>mysql -u sammy -p\r\n<\/code><\/pre>\n<\/div>\n<p>\u521b\u5efa\u4e00\u4e2a\u540d\u4e3a primary_keys \u7684\u6570\u636e\u5e93\uff1a<\/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 primary_keys;\r\n<\/code><\/pre>\n<\/div>\n<p>\u5982\u679c\u6570\u636e\u5e93\u521b\u5efa\u6210\u529f\uff0c\u60a8\u5c06\u6536\u5230\u4ee5\u4e0b\u8f93\u51fa\uff1a<\/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>\u8981\u9009\u62e9 primary_keys \u6570\u636e\u5e93\uff0c\u8bf7\u8fd0\u884c\u4ee5\u4e0b USE \u8bed\u53e5\uff1a<\/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>USE primary_keys;\r\n<\/code><\/pre>\n<\/div>\n<p>\u60a8\u5c06\u5f97\u5230\u4ee5\u4e0b\u8f93\u51fa\uff1a<\/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\nDatabase changed<\/code><\/pre>\n<\/div>\n<p>\u9009\u62e9\u6570\u636e\u5e93\u540e\uff0c\u60a8\u53ef\u4ee5\u5728\u5176\u4e2d\u521b\u5efa\u793a\u4f8b\u8868\u3002\u73b0\u5728\uff0c\u60a8\u53ef\u4ee5\u7ee7\u7eed\u9605\u8bfb\u672c\u6307\u5357\u7684\u5176\u4f59\u90e8\u5206\uff0c\u5f00\u59cb\u5728 MySQL \u4e2d\u4f7f\u7528\u4e3b\u952e\u3002.<\/p>\n<h2 id=\"%d9%85%d9%82%d8%af%d9%85%d9%87-%d8%a7%db%8c-%d8%a8%d8%b1-%da%a9%d9%84%db%8c%d8%af%d9%87%d8%a7%db%8c-%d8%a7%d8%b5%d9%84%db%8c\">\u5927\u8c03\u7b80\u4ecb<\/h2>\n<p>\u5173\u7cfb\u6570\u636e\u5e93\u4e2d\u7684\u6570\u636e\u5b58\u50a8\u5728\u5177\u6709\u7279\u5b9a\u3001\u7edf\u4e00\u7ed3\u6784\u7684\u8868\u4e2d\uff0c\u8fd9\u4e9b\u8868\u7531\u4e00\u884c\u884c\u7ec4\u6210\u3002\u8868\u5b9a\u4e49\u63cf\u8ff0\u4e86\u8868\u4e2d\u7684\u5217\u4ee5\u53ca\u6bcf\u5217\u53ef\u4ee5\u5b58\u50a8\u7684\u6570\u636e\u7c7b\u578b\u3002\u4ec5\u6b64\u5c31\u8db3\u4ee5\u5c06\u4fe1\u606f\u5b58\u50a8\u5728\u6570\u636e\u5e93\u4e2d\uff0c\u5e76\u4f7f\u7528 WHERE \u5b50\u53e5\u901a\u8fc7\u5404\u79cd\u7b5b\u9009\u6761\u4ef6\u67e5\u627e\u4fe1\u606f\u3002\u7136\u800c\uff0c\u8fd9\u79cd\u7ed3\u6784\u5e76\u4e0d\u80fd\u4fdd\u8bc1\u6bcf\u4e00\u884c\u90fd\u80fd\u88ab\u660e\u786e\u5730\u627e\u5230\u3002.<\/p>\n<p>\u60f3\u8c61\u4e00\u4e0b\uff0c\u6709\u4e00\u4e2a\u6570\u636e\u5e93\u8bb0\u5f55\u4e86\u6240\u6709\u83b7\u51c6\u5728\u516c\u5171\u9053\u8def\u4e0a\u884c\u9a76\u7684\u5df2\u6ce8\u518c\u8f66\u8f86\u3002\u8be5\u6570\u636e\u5e93\u5305\u542b\u8f66\u8f86\u7684\u54c1\u724c\u3001\u578b\u53f7\u3001\u751f\u4ea7\u5e74\u4efd\u548c\u8f66\u8eab\u989c\u8272\u7b49\u4fe1\u606f\u3002\u4f46\u662f\uff0c\u5982\u679c\u60a8\u8981\u67e5\u627e\u4e00\u8f862007\u5e74\u751f\u4ea7\u7684\u7ea2\u8272\u96ea\u4f5b\u5170\u79d1\u8fc8\u7f57\uff0c\u60a8\u53ef\u80fd\u4f1a\u627e\u5230\u4e0d\u6b62\u4e00\u8f86\u3002\u6bd5\u7adf\uff0c\u6c7d\u8f66\u5236\u9020\u5546\u4f1a\u5c06\u540c\u4e00\u6b3e\u8f66\u51fa\u552e\u7ed9\u591a\u4e2a\u5ba2\u6237\u3002\u8fd9\u5c31\u662f\u4e3a\u4ec0\u4e48\u6bcf\u8f86\u5df2\u6ce8\u518c\u8f66\u8f86\u90fd\u6709\u8f66\u724c\u6765\u8bc6\u522b\u8f66\u8f86\u7684\u539f\u56e0\u3002\u5982\u679c\u60a8\u641c\u7d22\u8f66\u724c\u53f7\u4e3aOFP857\u7684\u8f66\u8f86\uff0c\u60a8\u53ef\u4ee5\u786e\u5b9a\u53ea\u4f1a\u627e\u5230\u4e00\u8f86\u3002\u8fd9\u662f\u56e0\u4e3a\u6839\u636e\u6cd5\u5f8b\u89c4\u5b9a\uff0c\u8f66\u724c\u53f7\u662f\u552f\u4e00\u6807\u8bc6\u5df2\u6ce8\u518c\u8f66\u8f86\u7684\u3002\u5728\u5173\u7cfb\u6570\u636e\u5e93\u4e2d\uff0c\u8fd9\u6837\u7684\u6570\u636e\u88ab\u79f0\u4e3a\u4e3b\u952e\u3002.<\/p>\n<p>\u4e3b\u952e\u662f\u6570\u636e\u5e93\u8868\u4e2d\u67d0\u4e00\u5217\u6216\u67d0\u4e00\u7ec4\u5217\u4e2d\u7684\u552f\u4e00\u6807\u8bc6\u7b26\uff0c\u7528\u4e8e\u660e\u786e\u6807\u8bc6\u8868\u4e2d\u7684\u6bcf\u4e00\u884c\u3002\u4e3b\u952e\u7684\u6280\u672f\u7279\u6027\u4f53\u73b0\u5728\u4ee5\u4e0b\u51e0\u4e2a\u65b9\u9762\uff1a<\/p>\n<ul>\n<li>\u4e3b\u952e\u5fc5\u987b\u4f7f\u7528\u552f\u4e00\u503c\u3002\u5982\u679c\u4e3b\u952e\u7531\u591a\u4e2a\u5217\u7ec4\u6210\uff0c\u5219\u8fd9\u4e9b\u5217\u4e2d\u7684\u503c\u7ec4\u5408\u5728\u6574\u4e2a\u8868\u4e2d\u5fc5\u987b\u662f\u552f\u4e00\u7684\u3002\u7531\u4e8e\u4e3b\u952e\u65e8\u5728\u552f\u4e00\u6807\u8bc6\u6bcf\u4e00\u884c\uff0c\u56e0\u6b64\u5b83\u4e0d\u80fd\u51fa\u73b0\u591a\u6b21\u3002.<\/li>\n<li>\u4e3b\u952e\u4e0d\u5e94\u5305\u542b NULL \u503c\u3002.<\/li>\n<li>\u6bcf\u4e2a\u6570\u636e\u5e93\u8868\u53ea\u80fd\u4f7f\u7528\u4e00\u4e2a\u4e3b\u952e\u3002.<\/li>\n<\/ul>\n<p>\u6570\u636e\u5e93\u5f15\u64ce\u4f1a\u5f3a\u5236\u6267\u884c\u8fd9\u4e9b\u89c4\u5219\uff0c\u56e0\u6b64\u5982\u679c\u5728\u8868\u4e2d\u5b9a\u4e49\u4e86\u4e3b\u952e\uff0c\u5219\u53ef\u4ee5\u76f8\u4fe1\u8fd9\u4e9b\u5c5e\u6027\u662f\u6b63\u786e\u7684\u3002.<\/p>\n<p>\u9664\u4e86\u8fd9\u4e9b\u6280\u672f\u7279\u6027\u4e4b\u5916\uff0c\u60a8\u8fd8\u5e94\u8be5\u8003\u8651\u6570\u636e\u7684\u5185\u5bb9\uff0c\u4ee5\u786e\u5b9a\u54ea\u79cd\u7c7b\u578b\u7684\u6570\u636e\u9002\u5408\u4f5c\u4e3a\u4e3b\u952e\u3002\u81ea\u7136\u952e\u662f\u6570\u636e\u96c6\u4e2d\u5df2\u5b58\u5728\u7684\u6807\u8bc6\u7b26\uff0c\u800c\u4ee3\u7406\u952e\u662f\u4eba\u4e3a\u521b\u5efa\u7684\u6807\u8bc6\u7b26\u3002.<\/p>\n<p>\u6709\u4e9b\u6570\u636e\u7ed3\u6784\u7684\u4e3b\u952e\u81ea\u7136\u5b58\u5728\u4e8e\u6570\u636e\u96c6\u4e2d\uff0c\u4f8b\u5982\u8f66\u8f86\u6570\u636e\u5e93\u4e2d\u7684\u8f66\u724c\u53f7\u6216\u7f8e\u56fd\u516c\u6c11\u767b\u8bb0\u518c\u4e2d\u7684\u793e\u4f1a\u5b89\u5168\u53f7\u7801\u3002\u6709\u65f6\uff0c\u8fd9\u7c7b\u6807\u8bc6\u7b26\u5e76\u975e\u5355\u4e2a\u503c\uff0c\u800c\u662f\u4e00\u5bf9\u6216\u591a\u4e2a\u503c\u7684\u7ec4\u5408\u3002\u4f8b\u5982\uff0c\u5728\u672c\u5730\u57ce\u5e02\u623f\u5c4b\u540d\u5f55\u4e2d\uff0c\u4ec5\u51ed\u8857\u9053\u540d\u79f0\u6216\u95e8\u724c\u53f7\u65e0\u6cd5\u552f\u4e00\u6807\u8bc6\u4e00\u680b\u623f\u5c4b\u3002\u4e00\u6761\u8857\u9053\u4e0a\u53ef\u80fd\u6709\u591a\u680b\u623f\u5c4b\uff0c\u540c\u4e00\u4e2a\u95e8\u724c\u53f7\u4e5f\u53ef\u80fd\u51fa\u73b0\u5728\u591a\u6761\u8857\u9053\u4e0a\u3002\u4f46\u8857\u9053\u540d\u79f0\u548c\u95e8\u724c\u53f7\u7684\u7ec4\u5408\u53ef\u4ee5\u4f5c\u4e3a\u552f\u4e00\u7684\u623f\u5c4b\u6807\u8bc6\u7b26\u3002\u8fd9\u7c7b\u81ea\u7136\u5b58\u5728\u7684\u6807\u8bc6\u7b26\u88ab\u79f0\u4e3a\u81ea\u7136\u952e\u3002.<\/p>\n<p>\u7136\u800c\uff0c\u5f88\u591a\u65f6\u5019\uff0c\u4ec5\u51ed\u5355\u5217\u6216\u5c11\u6570\u51e0\u5217\u7684\u503c\u65e0\u6cd5\u552f\u4e00\u6807\u8bc6\u6570\u636e\u3002\u8fd9\u65f6\uff0c\u5c31\u9700\u8981\u521b\u5efa\u4eba\u5de5\u4e3b\u952e\uff0c\u4f8b\u5982\u4f7f\u7528\u6570\u5b57\u5e8f\u5217\u6216\u968f\u673a\u751f\u6210\u7684\u6807\u8bc6\u7b26\uff08\u5982UUID\uff09\u3002\u8fd9\u7c7b\u952e\u88ab\u79f0\u4e3a\u4ee3\u7406\u952e\u3002.<\/p>\n<p>\u5728\u4ee5\u4e0b\u7ae0\u8282\u4e2d\uff0c\u60a8\u5c06\u57fa\u4e8e\u4e00\u4e2a\u6216\u591a\u4e2a\u5217\u521b\u5efa\u81ea\u7136\u952e\uff0c\u5e76\u5728\u65e0\u6cd5\u4f7f\u7528\u81ea\u7136\u952e\u7684\u8868\u4e2d\u521b\u5efa\u5907\u7528\u952e\u3002.<\/p>\n<h2 id=\"%d8%a7%db%8c%d8%ac%d8%a7%d8%af-%db%8c%da%a9-%da%a9%d9%84%db%8c%d8%af-%d8%a7%d8%b5%d9%84%db%8c-%d8%af%d8%b1-%db%8c%da%a9-%d8%b3%d8%aa%d9%88%d9%86\">\u5728\u5217\u4e0a\u521b\u5efa\u4e3b\u952e<\/h2>\n<p>\u5728\u8bb8\u591a\u60c5\u51b5\u4e0b\uff0c\u6570\u636e\u96c6\u81ea\u7136\u5305\u542b\u4e00\u4e2a\u53ef\u7528\u4e8e\u552f\u4e00\u6807\u8bc6\u8868\u4e2d\u884c\u7684\u5217\u3002\u5728\u8fd9\u79cd\u60c5\u51b5\u4e0b\uff0c\u60a8\u53ef\u4ee5\u521b\u5efa\u4e00\u4e2a\u81ea\u7136\u952e\u6765\u63cf\u8ff0\u6570\u636e\u3002\u7ee7\u7eed\u524d\u9762\u7684\u8f66\u8f86\u767b\u8bb0\u6570\u636e\u5e93\u793a\u4f8b\uff0c\u5047\u8bbe\u6709\u4e00\u4e2a\u5177\u6709\u4ee5\u4e0b\u7ed3\u6784\u7684\u8868\uff1a<\/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>Sample table\r\n+---------------+-----------+------------+-------+------+\r\n| license_plate | brand | model | color | year |\r\n+---------------+-----------+------------+-------+------+\r\n| ABC123 | Ford | Mustang | Red | 2018 |\r\n| CES214 | Ford | Mustang | Red | 2018 |\r\n| DEF456 | Chevrolet | Camaro | Blue | 2016 |\r\n| GHI789 | Dodge | Challenger | Black | 2014 |\r\n+---------------+-----------+------------+-------+------+<\/code><\/pre>\n<\/div>\n<p>\u7b2c\u4e00\u884c\u548c\u7b2c\u4e8c\u884c\u90fd\u63cf\u8ff0\u4e86\u4e00\u8f86\u7ea2\u8272\u7684 2018 \u6b3e\u798f\u7279\u91ce\u9a6c\u3002\u4ec5\u51ed\u8f66\u8f86\u7684\u54c1\u724c\u548c\u578b\u53f7\u65e0\u6cd5\u552f\u4e00\u8bc6\u522b\u8be5\u8f66\u3002\u8f66\u724c\u53f7\u5728\u8fd9\u4e24\u4f8b\u4e2d\u90fd\u4e0d\u540c\uff0c\u56e0\u6b64\u53ef\u4ee5\u4e3a\u8868\u4e2d\u7684\u6bcf\u4e00\u884c\u63d0\u4f9b\u4e00\u4e2a\u5f88\u597d\u7684\u552f\u4e00\u6807\u8bc6\u7b26\u3002\u7531\u4e8e\u8f66\u724c\u53f7\u5df2\u7ecf\u662f\u6570\u636e\u7684\u4e00\u90e8\u5206\uff0c\u5c06\u5176\u7528\u4f5c\u4e3b\u952e\u53ef\u4ee5\u521b\u5efa\u4e00\u4e2a\u81ea\u7136\u952e\u3002\u5982\u679c\u5728\u521b\u5efa\u8868\u65f6\u672a\u5728 License_plate \u5217\u4e0a\u4f7f\u7528\u4e3b\u952e\uff0c\u5219\u6570\u636e\u96c6\u4e2d\u53ef\u80fd\u4f1a\u51fa\u73b0\u91cd\u590d\u9875\u6216\u7a7a\u9875\u3002.<\/p>\n<p>\u63a5\u4e0b\u6765\uff0c\u521b\u5efa\u4e00\u4e2a\u4e0e\u4e0a\u9762\u7c7b\u4f3c\u7684\u8868\uff0c\u4ee5 License_plate \u5217\u4f5c\u4e3a\u4e3b\u952e\uff0c\u5e76\u5305\u542b\u4ee5\u4e0b\u5217\uff1a<\/p>\n<ul>\n<li>License_plate\uff1a\u6b64\u5217\u5305\u542b\u8f66\u724c\u53f7\u7801\uff0c\u4ee5 varchar \u6570\u636e\u7c7b\u578b\u8868\u793a\u3002.<\/li>\n<li>\u54c1\u724c\uff1a\u6b64\u5217\u8868\u793a\u6c7d\u8f66\u54c1\u724c\uff0c\u4f7f\u7528 varchar \u6570\u636e\u7c7b\u578b\u8868\u793a\uff0c\u6700\u591a 50 \u4e2a\u5b57\u7b26\u3002.<\/li>\n<li>\u578b\u53f7\uff1a\u6b64\u5217\u5305\u542b\u6c7d\u8f66\u578b\u53f7\uff0c\u4f7f\u7528 varchar \u6570\u636e\u7c7b\u578b\u8868\u793a\uff0c\u6700\u591a 50 \u4e2a\u5b57\u7b26\u3002.<\/li>\n<li>\u989c\u8272\uff1a\u6b64\u5217\u5b58\u50a8\u989c\u8272\uff0c\u4f7f\u7528 varchar \u6570\u636e\u7c7b\u578b\u8868\u793a\uff0c\u6700\u591a 20 \u4e2a\u5b57\u7b26\u3002.<\/li>\n<li>\u5e74\u4efd\uff1a\u6b64\u5217\u663e\u793a\u6c7d\u8f66\u7684\u751f\u4ea7\u5e74\u4efd\uff0c\u4f7f\u7528 int \u6570\u636e\u7c7b\u578b\u5b58\u50a8\u6570\u503c\u6570\u636e\u3002.<\/li>\n<\/ul>\n<p>\u8981\u521b\u5efa machines \u8868\uff0c\u8bf7\u8fd0\u884c\u4ee5\u4e0b SQL \u8bed\u53e5\uff1a<\/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 cars (\r\nlicense_plate varchar(8) PRIMARY KEY,\r\nbrand varchar(50),\r\nmodel varchar(50),\r\ncolor varchar(20),\r\nyear int\r\n);... *\/<\/code><\/pre>\n<\/div>\n<p>PRIMARY KEY \u8bed\u53e5\u9075\u5faa License_plate \u6570\u636e\u7c7b\u578b\u7684\u5b9a\u4e49\u3002\u5f53\u5904\u7406\u57fa\u4e8e\u5355\u5217\u7684\u4e3b\u952e\u65f6\uff0c\u53ef\u4ee5\u4f7f\u7528\u7b80\u5316\u7684\u8bed\u6cd5\u521b\u5efa\u952e\uff0c\u5e76\u5c06\u4e3b\u952e\u5199\u5165\u5217\u5b9a\u4e49\u4e2d\u3002.<\/p>\n<p>\u5982\u679c\u6253\u5370\u51fa\u4ee5\u4e0b\u8f93\u51fa\uff0c\u5219\u8868\u793a\u8868\u683c\u5df2\u521b\u5efa\uff1a<\/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, 0 rows affected (0.00 sec)<\/code><\/pre>\n<\/div>\n<p>\u4e4b\u540e\uff0c\u901a\u8fc7\u6267\u884c\u4ee5\u4e0b INSERT INTO \u64cd\u4f5c\uff0c\u5c06\u4e0a\u9762\u793a\u4f8b\u4e2d\u63d0\u4f9b\u7684\u793a\u4f8b\u884c\u52a0\u8f7d\u5230\u8868\u4e2d\uff1a<\/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 cars VALUES\r\n('ABC123', 'Ford', 'Mustang', 'Red', 2018),\r\n('CES214', 'Ford', 'Mustang', 'Red', 2018),\r\n('DEF456', 'Chevrolet', 'Camaro', 'Blue', 2016),\r\n('GHI789', 'Dodge', 'Challenger', 'Black', 2014);<\/code><\/pre>\n<\/div>\n<p>\u6570\u636e\u5e93\u5c06\u8fd4\u56de\u6210\u529f\u6d88\u606f\uff1a<\/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, 4 rows affected (0.010 sec)\r\nRecords: 4 Duplicates: 0 Warnings: 0<\/code><\/pre>\n<\/div>\n<p>\u73b0\u5728\u53ef\u4ee5\u4f7f\u7528 SELECT \u8bed\u53e5\u9a8c\u8bc1\u65b0\u521b\u5efa\u7684\u8868\u662f\u5426\u5305\u542b\u9884\u671f\u7684\u6570\u636e\u548c\u683c\u5f0f\uff1a<\/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 * FROM cars;\r\n<\/code><\/pre>\n<\/div>\n<p>\u8f93\u51fa\u7ed3\u679c\u663e\u793a\u4e00\u4e2a\u4e0e\u672c\u8282\u5f00\u5934\u7c7b\u4f3c\u7684\u8868\u683c\uff1a<\/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| license_plate | brand | model | color | year |\r\n+---------------+-----------+------------+-------+------+\r\n| ABC123 | Ford | Mustang | Red | 2018 |\r\n| CES214 | Ford | Mustang | Red | 2018 |\r\n| DEF456 | Chevrolet | Camaro | Blue | 2016 |\r\n| GHI789 | Dodge | Challenger | Black | 2014 |\r\n+---------------+-----------+------------+-------+------+<\/code><\/pre>\n<\/div>\n<p>\u63a5\u4e0b\u6765\uff0c\u60a8\u53ef\u4ee5\u68c0\u67e5\u6570\u636e\u5e93\u5f15\u64ce\u662f\u5426\u4fdd\u8bc1\u4e3b\u952e\u89c4\u5219\u7684\u6709\u6548\u6027\u3002\u5c1d\u8bd5\u63d2\u5165\u4e00\u8f86\u8f66\u724c\u53f7\u91cd\u590d\u7684\u8f66\u8f86\uff0c\u8fd0\u884c\u4ee5\u4e0b\u547d\u4ee4\uff1a<\/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 cars VALUES ('DEF456', 'Jeep', 'Wrangler', 'Yellow', 2019);\r\n<\/code><\/pre>\n<\/div>\n<p>MySQL \u8fd4\u56de\u9519\u8bef\u6d88\u606f\uff0c\u6307\u51fa DEF456 \u6807\u7b7e\u5bfc\u81f4\u4e3b\u952e\u5b58\u5728\u91cd\u590d\u6761\u76ee\uff1a<\/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\">Output\r\nERROR 1062 (23000): Duplicate entry 'DEF456' for key 'cars.PRIMARY'<\/pre>\n<\/div>\n<p><span style=\"color: #ff0000;\">\u6ce8\u610f\uff1a\u4e3b\u952e\u5e95\u5c42\u662f\u901a\u8fc7\u552f\u4e00\u7d22\u5f15\u5b9e\u73b0\u7684\uff0c\u5b83\u4e0e\u60a8\u624b\u52a8\u4e3a\u8868\u4e2d\u5176\u4ed6\u5217\u521b\u5efa\u7684\u7d22\u5f15\u6709\u5f88\u591a\u76f8\u540c\u7684\u7279\u6027\u3002\u6700\u91cd\u8981\u7684\u662f\uff0c\u4e3b\u952e\u7d22\u5f15\u8fd8\u80fd\u63d0\u9ad8\u9488\u5bf9\u5b9a\u4e49\u7d22\u5f15\u7684\u5217\u7684\u67e5\u8be2\u6027\u80fd\u3002\u6709\u5173\u5982\u4f55\u4f7f\u7528\u7d22\u5f15\u7684\u66f4\u591a\u4fe1\u606f\uff0c\u8bf7\u53c2\u9605\u672c\u6559\u7a0b\u4e2d\u7684\u201c\u5982\u4f55\u4f7f\u7528\u7d22\u5f15\u201d\u6307\u5357\u3002.<\/span><\/p>\n<p>\u73b0\u5728\u60a8\u53ef\u4ee5\u786e\u5b9a\u91cd\u590d\u8f66\u724c\u662f\u4e0d\u5141\u8bb8\u7684\u3002\u63a5\u4e0b\u6765\uff0c\u8bf7\u68c0\u67e5\u7a7a\u767d\u8f66\u724c\u7684\u8f66\u8f86\u662f\u5426\u53ef\u4ee5\u8fdb\u53e3\uff1a<\/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 cars VALUES (NULL, 'Jeep', 'Wrangler', 'Yellow', 2019);\r\n<\/code><\/pre>\n<\/div>\n<p>\u8fd9\u4e00\u6b21\uff0c\u6570\u636e\u5e93\u5c06\u8fd4\u56de\u53e6\u4e00\u6761\u9519\u8bef\u4fe1\u606f\uff1a<\/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\nERROR 1048 (23000): Column 'license_plate' cannot be null<\/code><\/pre>\n<\/div>\n<p>\u6570\u636e\u5e93\u5f3a\u5236\u6267\u884c\u8fd9\u4e24\u6761\u89c4\u5219\u540e\uff0c\u53ef\u4ee5\u786e\u4fdd License_plate \u552f\u4e00\u6807\u8bc6\u8868\u4e2d\u7684\u6bcf\u4e00\u884c\u3002\u5982\u679c\u9488\u5bf9\u6bcf\u4e2a\u8f66\u724c\u53f7\u67e5\u8be2\u8be5\u8868\uff0c\u6bcf\u6b21\u67e5\u8be2\u90fd\u4f1a\u8fd4\u56de\u4e00\u884c\u6570\u636e\u3002.<\/p>\n<p>\u4e0b\u4e00\u8282\uff0c\u60a8\u5c06\u5b66\u4e60\u5982\u4f55\u4f7f\u7528\u591a\u5217\u4e3b\u952e\u3002.<\/p>\n<h2 id=\"%d8%a7%db%8c%d8%ac%d8%a7%d8%af-%db%8c%da%a9-%da%a9%d9%84%db%8c%d8%af-%d8%a7%d8%b5%d9%84%db%8c-%d8%af%d8%b1-%da%86%d9%86%d8%af%db%8c%d9%86-%d8%b3%d8%aa%d9%88%d9%86\">\u521b\u5efa\u8de8\u591a\u5217\u7684\u4e3b\u952e<\/h2>\n<p>\u5f53\u4e00\u5217\u4e0d\u8db3\u4ee5\u552f\u4e00\u6807\u8bc6\u8868\u4e2d\u7684\u4e00\u884c\u65f6\uff0c\u60a8\u53ef\u4ee5\u521b\u5efa\u4f7f\u7528\u591a\u5217\u7684\u4e3b\u952e\u3002.<\/p>\n<p>\u4f8b\u5982\uff0c\u60f3\u8c61\u4e00\u4e0b\u8fd9\u6837\u7684\u623f\u5c4b\u767b\u8bb0\u518c\uff1a\u4ec5\u51ed\u8857\u9053\u540d\u79f0\u6216\u8857\u9053\u53f7\u7801\u90fd\u4e0d\u8db3\u4ee5\u8bc6\u522b\u6bcf\u4e00\u680b\u623f\u5c4b\uff1a<\/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>Sample table\r\n+-------------------+---------------+-------------------+------+\r\n| street_name | street_number | house_owner | year |\r\n+-------------------+---------------+-------------------+------+\r\n| 5th Avenue | 100 | Bob Johnson | 2018 |\r\n| Broadway | 1500 | Jane Smith | 2016 |\r\n| Central Park West | 100 | John Doe | 2014 |\r\n| Central Park West | 200 | Tom Thompson | 2015 |\r\n| Lexington Avenue | 5001 | Samantha Davis | 2010 |\r\n| Park Avenue | 7000 | Michael Rodriguez | 2012 |\r\n+-------------------+---------------+-------------------+------+<\/code><\/pre>\n<\/div>\n<p>\u8868\u683c\u4e2d\uff0c\u201c\u4e2d\u592e\u516c\u56ed\u897f\u8def\u201d\u8fd9\u4e2a\u8857\u9053\u540d\u79f0\u51fa\u73b0\u4e86\u4e0d\u6b62\u4e00\u6b21\uff0c\u95e8\u724c\u53f7\u201c100\u201d\u4e5f\u51fa\u73b0\u4e86\u4e0d\u6b62\u4e00\u6b21\u3002\u4f46\u662f\uff0c\u6ca1\u6709\u53d1\u73b0\u91cd\u590d\u7684\u8857\u9053\u540d\u79f0\u548c\u95e8\u724c\u53f7\u7ec4\u5408\u3002\u5728\u8fd9\u79cd\u60c5\u51b5\u4e0b\uff0c\u867d\u7136\u8fd9\u4e24\u5217\u90fd\u4e0d\u80fd\u4f5c\u4e3a\u4e3b\u952e\uff0c\u4f46\u8fd9\u4e24\u4e2a\u503c\u7684\u7ec4\u5408\u53ef\u4ee5\u7528\u6765\u552f\u4e00\u6807\u8bc6\u8868\u683c\u4e2d\u7684\u6bcf\u4e00\u884c\u3002.<\/p>\n<p>\u63a5\u4e0b\u6765\uff0c\u521b\u5efa\u4e00\u4e2a\u7c7b\u4f3c\u4e8e\u4e0a\u56fe\u6240\u793a\u7684\u8868\u683c\uff0c\u5305\u542b\u4ee5\u4e0b\u5217\uff1a<\/p>\n<ul>\n<li>street_name\uff1a\u6b64\u5217\u8868\u793a\u623f\u5c4b\u6240\u5728\u8857\u9053\u7684\u540d\u79f0\uff0cvarchar \u6570\u636e\u7c7b\u578b\u9650\u5236\u4e3a 50 \u4e2a\u5b57\u7b26\u3002.<\/li>\n<li>street_number\uff1a\u6b64\u5217\u5b58\u50a8\u623f\u5c4b\u7684\u8857\u9053\u53f7\u7801\uff0c\u6570\u636e\u7c7b\u578b\u4e3a varchar\u3002\u6b64\u5217\u6700\u591a\u53ef\u5b58\u50a8 5 \u4e2a\u5b57\u7b26\u3002\u5b83\u4e0d\u4f7f\u7528 int \u6570\u503c\u6570\u636e\u7c7b\u578b\uff0c\u56e0\u4e3a\u6709\u4e9b\u8857\u9053\u53f7\u7801\u53ef\u80fd\u5305\u542b\u5b57\u6bcd\uff08\u4f8b\u5982 200B\uff09\u3002.<\/li>\n<li>house_owner\uff1a\u6b64\u5217\u5305\u542b\u623f\u5c4b\u6240\u6709\u8005\u7684\u59d3\u540d\uff0c\u4ee5\u9650\u5236\u4e3a 50 \u4e2a\u5b57\u7b26\u7684 varchar \u6570\u636e\u7c7b\u578b\u8868\u793a\u3002.<\/li>\n<li>\u5e74\u4efd\uff1a\u6b64\u5217\u8868\u793a\u623f\u5c4b\u7684\u5efa\u9020\u5e74\u4efd\uff0c\u4f7f\u7528 int \u6570\u636e\u7c7b\u578b\u5b58\u50a8\u6570\u503c\u3002.<\/li>\n<\/ul>\n<p>\u8fd9\u6b21\uff0c\u4e3b\u952e\u540c\u65f6\u4f7f\u7528\u4e86 street_name \u548c street_number \u5217\uff0c\u800c\u4e0d\u662f\u53ea\u4f7f\u7528\u5176\u4e2d\u4e00\u5217\u3002\u4e3a\u6b64\uff0c\u8bf7\u8fd0\u884c\u4ee5\u4e0b SQL \u8bed\u53e5\uff1a<\/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 houses (\r\nstreet_name varchar(50),\r\nstreet_number varchar(5),\r\nhouse_owner varchar(50),\r\nyear int,\r\nPRIMARY KEY(street_name, street_number)\r\n);<\/code><\/pre>\n<\/div>\n<p>\u4e0e\u4e4b\u524d\u7684\u793a\u4f8b\u4e0d\u540c\uff0c\u8fd9\u6b21 PRIMARY KEY \u8bed\u53e5\u51fa\u73b0\u5728\u5217\u5b9a\u4e49\u4e0b\u65b9\u3002PRIMARY KEY \u8bed\u53e5\u7528\u62ec\u53f7\u62ec\u8d77\u6765\uff0c\u5305\u542b\u4e24\u4e2a\u5217\u540d\uff1astreet_name \u548c street_number\u3002\u8fd9\u79cd\u8bed\u6cd5\u5728 houses \u8868\u4e2d\u521b\u5efa\u4e86\u4e00\u4e2a\u4e3b\u952e\uff0c\u8be5\u4e3b\u952e\u7531\u4e24\u5217\u7ec4\u6210\u3002.<\/p>\n<p>\u5982\u679c\u6253\u5370\u51fa\u4ee5\u4e0b\u8f93\u51fa\uff0c\u5219\u8868\u793a\u8868\u683c\u5df2\u521b\u5efa\uff1a<\/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, 0 rows affected (0.00 sec)<\/code><\/pre>\n<\/div>\n<p>\u4e4b\u540e\uff0c\u901a\u8fc7\u6267\u884c\u4ee5\u4e0b INSERT INTO \u64cd\u4f5c\uff0c\u5c06\u524d\u9762\u793a\u4f8b\u4e2d\u63d0\u4f9b\u7684\u793a\u4f8b\u884c\u52a0\u8f7d\u5230\u8868\u4e2d\uff1a<\/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 houses VALUES\r\n('Central Park West', '100', 'John Doe', 2014),\r\n('Broadway', '1500', 'Jane Smith', 2016),\r\n('5th Avenue', '100', 'Bob Johnson', 2018),\r\n('Lexington Avenue', '5001', 'Samantha Davis', 2010),\r\n('Park Avenue', '7000', 'Michael Rodriguez', 2012),\r\n('Central Park West', '200', 'Tom Thompson', 2015);\r\n<\/code><\/pre>\n<\/div>\n<p>\u6570\u636e\u5e93\u5c06\u8fd4\u56de\u6210\u529f\u6d88\u606f\uff1a<\/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, 6 rows affected (0.000 sec)\r\nRecords: 6 Duplicates: 0 Warnings: 0<\/code><\/pre>\n<\/div>\n<p>\u73b0\u5728\u53ef\u4ee5\u4f7f\u7528 SELECT \u8bed\u53e5\u9a8c\u8bc1\u65b0\u521b\u5efa\u7684\u8868\u662f\u5426\u5305\u542b\u9884\u671f\u7684\u6570\u636e\u548c\u683c\u5f0f\uff1a<\/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 * FROM houses;\r\n<\/code><\/pre>\n<\/div>\n<p>\u8f93\u51fa\u7ed3\u679c\u663e\u793a\u4e00\u4e2a\u4e0e\u672c\u8282\u5f00\u5934\u7c7b\u4f3c\u7684\u8868\u683c\uff1a<\/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| street_name | street_number | house_owner | year |\r\n+-------------------+---------------+-------------------+------+\r\n| 5th Avenue | 100 | Bob Johnson | 2018 |\r\n| Broadway | 1500 | Jane Smith | 2016 |\r\n| Central Park West | 100 | John Doe | 2014 |\r\n| Central Park West | 200 | Tom Thompson | 2015 |\r\n| Lexington Avenue | 5001 | Samantha Davis | 2010 |\r\n| Park Avenue | 7000 | Michael Rodriguez | 2012 |\r\n+-------------------+---------------+-------------------+------+\r\n6 rows in set (0.000 sec)<\/code><\/pre>\n<\/div>\n<p>\u73b0\u5728\uff0c\u6211\u4eec\u6765\u68c0\u67e5\u4e00\u4e0b\u6570\u636e\u5e93\u662f\u5426\u5141\u8bb8\u8857\u9053\u540d\u79f0\u548c\u95e8\u724c\u53f7\u91cd\u590d\uff0c\u4f46\u9650\u5236\u5b8c\u6574\u5730\u5740\u91cd\u590d\u51fa\u73b0\u5728\u8868\u4e2d\u3002\u6211\u4eec\u5148\u5728\u516c\u56ed\u8857\u4e0a\u6dfb\u52a0\u53e6\u4e00\u680b\u623f\u5b50\uff1a<\/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 houses VALUES ('Park Avenue', '8000', 'Emily Brown', 2011);\r\n<\/code><\/pre>\n<\/div>\n<p>MySQL \u8fd4\u56de\u6210\u529f\u6d88\u606f\uff0c\u56e0\u4e3a\u5730\u5740 8000 Park Avenue \u4e4b\u524d\u5e76\u672a\u51fa\u73b0\u5728\u8868\u4e2d\uff1a<\/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 (0.010 sec)<\/code><\/pre>\n<\/div>\n<p>\u5f53\u4f60\u5728\u4e3b\u8857 8000 \u53f7\u6dfb\u52a0\u4e00\u680b\u623f\u5b50\u5e76\u91cd\u590d\u4f7f\u7528\u8857\u9053\u53f7\u7801\u65f6\uff0c\u4e5f\u4f1a\u51fa\u73b0\u7c7b\u4f3c\u7684\u7ed3\u679c\uff1a<\/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 houses VALUES ('Main Street', '8000', 'David Jones', 2009);\r\n<\/code><\/pre>\n<\/div>\n<p>\u540c\u6837\uff0c\u8fd9\u6837\u505a\u53ef\u4ee5\u6b63\u786e\u63d2\u5165\u65b0\u884c\uff0c\u56e0\u4e3a\u5730\u5740\u6ca1\u6709\u91cd\u590d\uff1a<\/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 (0.010 sec)<\/code><\/pre>\n<\/div>\n<p>\u4f46\u662f\uff0c\u8bf7\u4f7f\u7528\u4ee5\u4e0b INSERT \u8bed\u53e5\u5728\u7b2c\u4e94\u5927\u9053 100 \u53f7\u6dfb\u52a0\u53e6\u4e00\u680b\u623f\u5c4b\uff1a<\/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 houses VALUES ('5th Avenue', '100', 'Josh Gordon', 2008);\r\n<\/code><\/pre>\n<\/div>\n<p>\u6570\u636e\u5e93\u8fd4\u56de\u9519\u8bef\u6d88\u606f\uff0c\u544a\u77e5\u60a8\u4e3b\u952e\u4e2d\u5b58\u5728\u91cd\u590d\u6761\u76ee\uff0c\u5176\u503c\u5bf9\u4e3a 5th Avenue \u548c 100\uff1a<\/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\nERROR 1062 (23000): Duplicate entry '5th Avenue-100' for key 'houses.PRIMARY'<\/code><\/pre>\n<\/div>\n<p>\u6570\u636e\u5e93\u6b63\u786e\u5730\u6267\u884c\u4e86\u4e3b\u952e\u89c4\u5219\uff0c\u4e3b\u952e\u5b9a\u4e49\u5728\u4e00\u5bf9\u5217\u4e0a\u3002\u60a8\u53ef\u4ee5\u653e\u5fc3\uff0c\u5b8c\u6574\u7684\u5730\u5740\uff08\u5305\u62ec\u8857\u9053\u540d\u79f0\u548c\u95e8\u724c\u53f7\uff09\u4e0d\u4f1a\u5728\u8868\u4e2d\u91cd\u590d\u51fa\u73b0\u3002.<\/p>\n<p>\u5728\u672c\u8282\u4e2d\uff0c\u60a8\u521b\u5efa\u4e86\u4e00\u4e2a\u5305\u542b\u4e24\u5217\u7684\u81ea\u7136\u952e\uff0c\u7528\u4e8e\u552f\u4e00\u6807\u8bc6 home \u8868\u4e2d\u7684\u6bcf\u4e00\u884c\u3002\u4f46\u662f\uff0c\u4e3b\u952e\u5e76\u975e\u603b\u662f\u53ef\u4ee5\u4ece\u6570\u636e\u96c6\u4e2d\u63d0\u53d6\u7684\u3002\u5728\u4e0b\u4e00\u8282\u4e2d\uff0c\u60a8\u5c06\u4f7f\u7528\u5e76\u975e\u76f4\u63a5\u6765\u81ea\u6570\u636e\u7684\u4eba\u5de5\u4e3b\u952e\u3002.<\/p>\n<h2 id=\"%d8%a7%db%8c%d8%ac%d8%a7%d8%af-%db%8c%da%a9-%da%a9%d9%84%db%8c%d8%af-%d8%a7%d8%b5%d9%84%db%8c-%d9%85%d8%aa%d9%88%d8%a7%d9%84%db%8c\">\u521b\u5efa\u987a\u5e8f\u4e3b\u952e<\/h2>\n<p>\u5230\u76ee\u524d\u4e3a\u6b62\uff0c\u60a8\u5df2\u7ecf\u4f7f\u7528\u793a\u4f8b\u6570\u636e\u96c6\u4e2d\u7684\u5217\u521b\u5efa\u4e86\u552f\u4e00\u7684\u4e3b\u952e\u3002\u4f46\u5728\u67d0\u4e9b\u60c5\u51b5\u4e0b\uff0c\u6570\u636e\u4e0d\u53ef\u907f\u514d\u5730\u4f1a\u91cd\u590d\uff0c\u5bfc\u81f4\u5217\u65e0\u6cd5\u4f5c\u4e3a\u6709\u6548\u7684\u552f\u4e00\u6807\u8bc6\u7b26\u3002\u5728\u8fd9\u79cd\u60c5\u51b5\u4e0b\uff0c\u60a8\u53ef\u4ee5\u4f7f\u7528\u751f\u6210\u7684\u6807\u8bc6\u7b26\u521b\u5efa\u987a\u5e8f\u4e3b\u952e\u3002\u5f53\u60a8\u7684\u6570\u636e\u9700\u8981\u521b\u5efa\u65b0\u7684\u6807\u8bc6\u7b26\u6765\u6807\u8bc6\u884c\u65f6\uff0c\u57fa\u4e8e\u8fd9\u4e9b\u4eba\u5de5\u6807\u8bc6\u7b26\u521b\u5efa\u7684\u4e3b\u952e\u79f0\u4e3a\u4ee3\u7406\u952e\u3002.<\/p>\n<p>\u60f3\u8c61\u4e00\u4e0b\u8bfb\u4e66\u4ff1\u4e50\u90e8\u6210\u5458\u540d\u5355\u2014\u2014\u8fd9\u662f\u4e00\u4e2a\u975e\u6b63\u5f0f\u7684\u805a\u4f1a\uff0c\u4efb\u4f55\u4eba\u90fd\u53ef\u4ee5\u52a0\u5165\uff0c\u65e0\u9700\u51fa\u793a\u653f\u5e9c\u9881\u53d1\u7684\u8eab\u4efd\u8bc1\u4ef6\u3002\u5f88\u53ef\u80fd\u5728\u67d0\u4e2a\u65f6\u5019\uff0c\u540d\u5b57\u76f8\u4f3c\u7684\u4eba\u4f1a\u52a0\u5165\u8fd9\u4e2a\u4ff1\u4e50\u90e8\uff1a<\/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>Sample table\r\n+------------+-----------+\r\n| first_name | last_name |\r\n+------------+-----------+\r\n| John | Doe |\r\n| Jane | Smith |\r\n| Bob | Johnson |\r\n| Samantha | Davis |\r\n| Michael | Rodriguez |\r\n| Tom | Thompson |\r\n| Sara | Johnson |\r\n| David | Jones |\r\n| Jane | Smith |\r\n| Bob | Johnson |\r\n+------------+-----------+<\/code><\/pre>\n<\/div>\n<p>\u8868\u683c\u4e2d\u51fa\u73b0\u4e86\u91cd\u590d\u7684 Bob Johnson \u548c Jane Smith \u8fd9\u4e24\u4e2a\u540d\u5b57\u3002\u4f60\u9700\u8981\u4f7f\u7528\u989d\u5916\u7684\u6807\u8bc6\u7b26\u6765\u533a\u5206\u4ed6\u4eec\uff0c\u800c\u4e14\u76ee\u524d\u65e0\u6cd5\u552f\u4e00\u6807\u8bc6\u8868\u683c\u4e2d\u7684\u6bcf\u4e00\u884c\u3002\u5982\u679c\u4f60\u7528\u7eb8\u8d28\u65b9\u5f0f\u8bb0\u5f55\u8bfb\u4e66\u4f1a\u6210\u5458\u540d\u5355\uff0c\u4f60\u53ef\u4ee5\u4f7f\u7528\u8f85\u52a9\u6807\u8bc6\u7b26\u6765\u5e2e\u52a9\u533a\u5206\u59d3\u540d\u76f8\u4f3c\u7684\u4eba\u3002.<\/p>\n<p>\u5728\u5173\u7cfb\u6570\u636e\u5e93\u4e2d\uff0c\u60a8\u4e5f\u53ef\u4ee5\u901a\u8fc7\u6dfb\u52a0\u4e00\u4e2a\u989d\u5916\u7684\u5217\u6765\u5b9e\u73b0\u7c7b\u4f3c\u7684\u529f\u80fd\uff0c\u8be5\u5217\u5b58\u50a8\u751f\u6210\u7684\u975e\u771f\u5b9e ID\uff0c\u5176\u552f\u4e00\u76ee\u7684\u662f\u552f\u4e00\u5730\u9694\u79bb\u8868\u4e2d\u7684\u6240\u6709\u884c\u3002\u6211\u4eec\u5c06\u5176\u79f0\u4e3a Member_id\u3002.<\/p>\n<p>\u7136\u800c\uff0c\u6bcf\u6b21\u60f3\u5728\u6570\u636e\u5e93\u4e2d\u6dfb\u52a0\u65b0\u7684\u8bfb\u4e66\u4ff1\u4e50\u90e8\u6210\u5458\u65f6\uff0c\u90fd\u8981\u521b\u5efa\u8fd9\u6837\u7684\u6807\u8bc6\u7b26\uff0c\u8fd9\u5f88\u9ebb\u70e6\u3002\u4e3a\u4e86\u89e3\u51b3\u8fd9\u4e2a\u95ee\u9898\uff0cMySQL \u63d0\u4f9b\u4e86\u6570\u503c\u5217\u81ea\u589e\u529f\u80fd\uff0c\u6570\u636e\u5e93\u4f1a\u81ea\u52a8\u6309\u6574\u6570\u5e8f\u5217\u9012\u589e\u5217\u503c\u3002.<\/p>\n<p>\u8ba9\u6211\u4eec\u521b\u5efa\u4e00\u4e2a\u4e0e\u4e0a\u9762\u7c7b\u4f3c\u7684\u8868\u3002\u60a8\u9700\u8981\u6dfb\u52a0\u4e00\u4e2a\u81ea\u589e\u5217\uff08member_id\uff09\uff0c\u7528\u4e8e\u5b58\u50a8\u6bcf\u4e2a\u4ff1\u4e50\u90e8\u6210\u5458\u81ea\u52a8\u5206\u914d\u7684\u7f16\u53f7\u3002\u8be5\u81ea\u52a8\u5206\u914d\u7684\u7f16\u53f7\u5c06\u4f5c\u4e3a\u8868\u7684\u4e3b\u952e\uff1a<\/p>\n<p>Member_id\uff1a\u6b64\u5217\u5177\u6709\u81ea\u589e\u6570\u5b57\u6807\u8bc6\u7b26\uff0c\u7531 int \u6570\u636e\u7c7b\u578b\u8868\u793a\u3002.<\/p>\n<p>first_name\uff1a\u6b64\u5217\u5305\u542b\u4ff1\u4e50\u90e8\u6210\u5458\u7684\u540d\u5b57\uff0c\u4ee5\u9650\u5236\u4e3a 50 \u4e2a\u5b57\u7b26\u7684 varchar \u6570\u636e\u7c7b\u578b\u8868\u793a\u3002.<\/p>\n<p>last_name\uff1a\u6b64\u5217\u4fdd\u5b58\u4ff1\u4e50\u90e8\u6210\u5458\u7684\u59d3\u6c0f\uff0c\u4ee5\u9650\u5236\u4e3a 50 \u4e2a\u5b57\u7b26\u7684 varchar \u6570\u636e\u7c7b\u578b\u663e\u793a\u3002.<\/p>\n<p>\u8981\u521b\u5efa\u8be5\u8868\uff0c\u8bf7\u8fd0\u884c\u4ee5\u4e0b SQL \u8bed\u53e5\uff1a<\/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 club_members (\r\nmember_id int AUTO_INCREMENT PRIMARY KEY,\r\nfirst_name varchar(50),\r\nlast_name varchar(50)\r\n);<\/code><\/pre>\n<\/div>\n<p>\u867d\u7136 PRIMARY KEY \u8bed\u53e5\u51fa\u73b0\u5728\u5217\u7c7b\u578b\u5b9a\u4e49\u4e4b\u540e\uff08\u5c31\u50cf\u5355\u5217\u4e3b\u952e\u4e00\u6837\uff09\uff0c\u4f46\u5b83\u524d\u9762\u8fd8\u6709\u4e00\u4e2a\u989d\u5916\u7684\u5c5e\u6027\uff1aAUTO_INCREMENT\u3002\u5b83\u544a\u8bc9 MySQL\uff0c\u5982\u679c\u6ca1\u6709\u663e\u5f0f\u63d0\u4f9b\u503c\uff0c\u5219\u4f7f\u7528\u9012\u589e\u7684\u6570\u5b57\u5e8f\u5217\u81ea\u52a8\u4e3a\u8be5\u5217\u751f\u6210\u503c\u3002.<\/p>\n<p><span style=\"color: #ff0000;\">\u6ce8\u610f\uff1a\u5217\u5b9a\u4e49\u7684 AUTO_INCREMENT \u5c5e\u6027\u662f MySQL \u7279\u6709\u7684\u3002\u5176\u4ed6\u6570\u636e\u5e93\u901a\u5e38\u4e5f\u63d0\u4f9b\u7c7b\u4f3c\u7684\u751f\u6210\u987a\u5e8f\u952e\u7684\u65b9\u6cd5\uff0c\u4f46\u8bed\u6cd5\u56e0\u6570\u636e\u5e93\u5f15\u64ce\u800c\u5f02\u3002\u5982\u6709\u7591\u95ee\uff0c\u5efa\u8bae\u67e5\u9605\u60a8\u6240\u7528\u5173\u7cfb\u6570\u636e\u5e93\u7ba1\u7406\u7cfb\u7edf\u7684\u5b98\u65b9\u6587\u6863\u3002.<\/span><\/p>\n<p><span style=\"color: #000000;\">\u5982\u679c\u6253\u5370\u51fa\u4ee5\u4e0b\u8f93\u51fa\uff0c\u5219\u8868\u793a\u8868\u683c\u5df2\u521b\u5efa\uff1a<\/span><\/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, 0 rows affected (0.00 sec)<\/code><\/pre>\n<\/div>\n<p>\u4e4b\u540e\uff0c\u901a\u8fc7\u6267\u884c\u4ee5\u4e0b INSERT INTO \u64cd\u4f5c\uff0c\u5c06\u4e0a\u9762\u793a\u4f8b\u4e2d\u63d0\u4f9b\u7684\u793a\u4f8b\u884c\u52a0\u8f7d\u5230\u8868\u4e2d\uff1a<\/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 club_members (first_name, last_name) VALUES\r\n('John', 'Doe'),\r\n('Jane', 'Smith'),\r\n('Bob', 'Johnson'),\r\n('Samantha', 'Davis'),\r\n('Michael', 'Rodriguez'),\r\n('Tom', 'Thompson'),\r\n('Sara', 'Johnson'),\r\n('David', 'Jones'),\r\n('Jane', 'Smith'),\r\n('Bob', 'Johnson');<\/code><\/pre>\n<\/div>\n<p>INSERT \u8bed\u53e5\u73b0\u5728\u5305\u542b\u5217\u540d\u5217\u8868\uff08first_name \u548c last_name\uff09\uff0c\u8fd9\u786e\u4fdd\u6570\u636e\u5e93\u77e5\u9053\u6570\u636e\u96c6\u4e2d\u672a\u63d0\u4f9b Member_id \u5217\uff0c\u56e0\u6b64\u5e94\u8be5\u4f7f\u7528\u5176\u9ed8\u8ba4\u503c\u3002.<\/p>\n<p>\u6570\u636e\u5e93\u5c06\u8fd4\u56de\u6210\u529f\u6d88\u606f\uff1a<\/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, 10 rows affected (0.002 sec)\r\nRecords: 10 Duplicates: 0 Warnings: 0<\/code><\/pre>\n<\/div>\n<p>\u4f7f\u7528 SELECT \u8bed\u53e5\u9a8c\u8bc1\u65b0\u521b\u5efa\u7684\u8868\u4e2d\u7684\u6570\u636e\uff1a<\/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 * FROM club_members;\r\n<\/code><\/pre>\n<\/div>\n<p>\u8f93\u51fa\u7ed3\u679c\u663e\u793a\u4e00\u4e2a\u4e0e\u672c\u8282\u5f00\u5934\u7c7b\u4f3c\u7684\u8868\u683c\uff1a<\/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| member_id | first_name | last_name |\r\n+-----------+------------+-----------+\r\n| 1 | John | Doe |\r\n| 2 | Jane | Smith |\r\n| 3 | Bob | Johnson |\r\n| 4 | Samantha | Davis |\r\n| 5 | Michael | Rodriguez |\r\n| 6 | Tom | Thompson |\r\n| 7 | Sara | Johnson |\r\n| 8 | David | Jones |\r\n| 9 | Jane | Smith |\r\n| 10 | Bob | Johnson |\r\n+-----------+------------+-----------+\r\n10 rows in set (0.000 sec)<\/code><\/pre>\n<\/div>\n<p>\u7136\u800c\uff0c\u8fd9\u4e00\u6b21\uff0c\u7ed3\u679c\u4e2d\u51fa\u73b0\u4e86 Member_id \u5217\uff0c\u5176\u4e2d\u5305\u542b 1 \u5230 10 \u7684\u6570\u5b57\u5e8f\u5217\u3002\u6709\u4e86\u8fd9\u4e00\u5217\uff0cJane Smith \u548c Bob Johnson \u7684\u91cd\u590d\u884c\u5c31\u65e0\u6cd5\u8bc6\u522b\u4e86\uff0c\u56e0\u4e3a\u6bcf\u4e2a\u540d\u5b57\u90fd\u4e0e\u4e00\u4e2a\u552f\u4e00\u7684\u6807\u8bc6\u7b26 (Member_id) \u76f8\u5173\u8054\u3002.<\/p>\n<p>\u73b0\u5728\uff0c\u8ba9\u6211\u4eec\u68c0\u67e5\u4e00\u4e0b\u6570\u636e\u5e93\u662f\u5426\u5141\u8bb8\u6211\u4eec\u5c06\u53e6\u4e00\u4f4d\u6c64\u59c6\u00b7\u6c64\u666e\u68ee\u6dfb\u52a0\u5230\u4ff1\u4e50\u90e8\u4f1a\u5458\u540d\u5355\u4e2d\uff1a<\/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 club_members (first_name, last_name) VALUES ('Tom', 'Thompson');\r\n<\/code><\/pre>\n<\/div>\n<p>MySQL \u5c06\u8fd4\u56de\u6210\u529f\u6d88\u606f\uff1a<\/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 (0.009 sec)\r\n<\/code><\/pre>\n<\/div>\n<p>\u8981\u68c0\u67e5\u6570\u636e\u5e93\u4e3a\u65b0\u6761\u76ee\u5206\u914d\u7684\u6570\u5b57 ID\uff0c\u8bf7\u518d\u6b21\u8fd0\u884c SELECT \u67e5\u8be2\uff1a<\/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 * FROM club_members;\r\n<\/code><\/pre>\n<\/div>\n<p>\u8f93\u51fa\u7ed3\u679c\u4e2d\u8fd8\u6709\u4e00\u884c\uff1a<\/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| member_id | first_name | last_name |\r\n+-----------+------------+-----------+\r\n| 1 | John | Doe |\r\n| 2 | Jane | Smith |\r\n| 3 | Bob | Johnson |\r\n| 4 | Samantha | Davis |\r\n| 5 | Michael | Rodriguez |\r\n| 6 | Tom | Thompson |\r\n| 7 | Sara | Johnson |\r\n| 8 | David | Jones |\r\n| 9 | Jane | Smith |\r\n| 10 | Bob | Johnson |\r\n| 11 | Tom | Thompson |\r\n+-----------+------------+-----------+\r\n11 rows in set (0.000 sec)<\/code><\/pre>\n<\/div>\n<p>\u901a\u8fc7\u6570\u636e\u5e93\u7684 AUTO_INCREMENT \u5c5e\u6027\uff0c\u81ea\u52a8\u4e3a Member_id \u5217\u4e2d\u7684\u65b0\u884c\u5206\u914d\u4e86\u6570\u5b57 11\u3002.<\/p>\n<p>\u5982\u679c\u60a8\u6b63\u5728\u5904\u7406\u7684\u6570\u636e\u6ca1\u6709\u5929\u7136\u7684\u4e3b\u952e\u5019\u9009\u5bf9\u8c61\uff0c\u5e76\u4e14\u60a8\u4e0d\u60f3\u6bcf\u6b21\u5411\u6570\u636e\u5e93\u6dfb\u52a0\u65b0\u6570\u636e\u65f6\u90fd\u60f3\u51fa\u4eba\u4e3a\u7684\u6807\u8bc6\u7b26\uff0c\u5219\u53ef\u4ee5\u5b89\u5168\u5730\u4f9d\u8d56\u987a\u5e8f\u751f\u6210\u7684\u6807\u8bc6\u7b26\u4f5c\u4e3a\u4e3b\u952e\u3002.<\/p>\n<h2 id=\"%d9%86%d8%aa%db%8c%d8%ac%d9%87\">\u7ed3\u679c<\/h2>\n<p>\u901a\u8fc7\u672c\u6307\u5357\uff0c\u60a8\u5b66\u4e60\u4e86\u4ec0\u4e48\u662f\u4e3b\u952e\uff0c\u4ee5\u53ca\u5982\u4f55\u5728 MySQL \u4e2d\u521b\u5efa\u5e38\u7528\u7c7b\u578b\u7684\u4e3b\u952e\u6765\u6807\u8bc6\u6570\u636e\u5e93\u8868\u4e2d\u7684\u552f\u4e00\u884c\u3002\u60a8\u521b\u5efa\u4e86\u81ea\u7136\u4e3b\u952e\u3001\u8de8\u591a\u5217\u7684\u4e3b\u952e\uff0c\u5e76\u5728\u4e0d\u5b58\u5728\u81ea\u7136\u4e3b\u952e\u7684\u60c5\u51b5\u4e0b\u4f7f\u7528\u4e86\u81ea\u589e\u987a\u5e8f\u952e\u3002.<\/p>","protected":false},"excerpt":{"rendered":"\u5f15\u8a00 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