{"id":5629,"date":"2024-11-14T08:14:37","date_gmt":"2024-11-14T00:14:37","guid":{"rendered":"https:\/\/fwq.ai\/blog\/5629\/"},"modified":"2024-11-14T08:14:37","modified_gmt":"2024-11-14T00:14:37","slug":"sql%e5%ae%8c%e6%95%b4%e6%80%a7%e7%ba%a6%e6%9d%9f%e6%80%8e%e4%b9%88%e8%ae%be%e7%bd%ae","status":"publish","type":"post","link":"https:\/\/fwq.ai\/blog\/5629\/","title":{"rendered":"sql\u5b8c\u6574\u6027\u7ea6\u675f\u600e\u4e48\u8bbe\u7f6e"},"content":{"rendered":"

\n sql \u5b8c\u6574\u6027\u7ea6\u675f\u662f\u4e00\u7ec4\u89c4\u5219\uff0c\u7528\u4e8e\u786e\u4fdd\u6570\u636e\u5e93\u4e2d\u6570\u636e\u7684\u51c6\u786e\u6027\u548c\u4e00\u81f4\u6027\u3002\u5b83\u53ef\u4ee5\u9632\u6b62\u4e0d\u4e00\u81f4\u548c\u65e0\u6548\u7684\u6570\u636e\u8fdb\u5165\u6570\u636e\u5e93\uff0c\u5e76\u901a\u8fc7\u4ee5\u4e0b\u8bed\u6cd5\u5728 create table \u8bed\u53e5\u4e2d\u8bbe\u7f6e\uff1a\u975e\u7a7a\u7ea6\u675f\uff1a\u786e\u4fdd\u5217\u4e0d\u80fd\u5305\u542b\u7a7a\u503c\u3002\u4e3b\u952e\u7ea6\u675f\uff1a\u6307\u5b9a\u552f\u4e00\u6807\u8bc6\u8868\u7684\u6bcf\u4e00\u884c\u7684\u4e00\u5217\u6216\u4e00\u7ec4\u5217\u3002\u5916\u952e\u7ea6\u675f\uff1a\u786e\u4fdd\u8868\u4e2d\u7684\u5217\u503c\u4e0e\u53e6\u4e00\u4e2a\u8868\u4e2d\u5217\u503c\u7684\u5b8c\u6574\u6027\u3002\u552f\u4e00\u7ea6\u675f\uff1a\u6307\u5b9a\u8868\u4e2d\u7684\u5217\u503c\u5fc5\u987b\u662f\u552f\u4e00\u7684\u3002\u68c0\u67e5\u7ea6\u675f\uff1a\u786e\u4fdd\u8868\u4e2d\u7684\u6570\u636e\u6ee1\u8db3\u6307\u5b9a\u7684\u6761\u4ef6\u6216\u8868\u8fbe\u5f0f\u3002\n<\/p><\/blockquote>\n

\"sql\u5b8c\u6574\u6027\u7ea6\u675f\u600e\u4e48\u8bbe\u7f6e\u63d2\u56fe\"<\/p>\n

SQL \u5b8c\u6574\u6027\u7ea6\u675f<\/strong><\/p>\n

\u4ec0\u4e48\u662f SQL \u5b8c\u6574\u6027\u7ea6\u675f\uff1f<\/strong><\/p>\n

SQL \u5b8c\u6574\u6027\u7ea6\u675f\u662f\u4e00\u7ec4\u89c4\u5219\uff0c\u7528\u4e8e\u786e\u4fdd\u6570\u636e\u5e93\u4e2d\u7684\u6570\u636e\u51c6\u786e\u6027\u548c\u4e00\u81f4\u6027\u3002\u5b83\u6709\u52a9\u4e8e\u9632\u6b62\u4e0d\u4e00\u81f4\u548c\u65e0\u6548\u7684\u6570\u636e\u8fdb\u5165\u6570\u636e\u5e93\u3002<\/p>\n

\u5982\u4f55\u8bbe\u7f6e SQL \u5b8c\u6574\u6027\u7ea6\u675f\uff1f<\/strong><\/p>\n

\u5728 CREATE TABLE \u8bed\u53e5\u4e2d\uff0c\u53ef\u4ee5\u4f7f\u7528\u4ee5\u4e0b\u8bed\u6cd5\u8bbe\u7f6e SQL \u5b8c\u6574\u6027\u7ea6\u675f\uff1a<\/p>\n

CREATE TABLE table_name (\n  column_name data_type [NOT] NULL,\n  [PRIMARY KEY (column_list)],\n  [FOREIGN KEY (column_list) REFERENCES referenced_table (referenced_column_list)],\n  [UNIQUE (column_list)],\n  [CHECK (expression)]\n);<\/pre>\n
  \u767b\u5f55\u540e\u590d\u5236   <\/p>\n
\u4e0d\u540c\u7c7b\u578b\u7684\u5b8c\u6574\u6027\u7ea6\u675f<\/strong><\/p>\n
    \n
  •  \u975e\u7a7a\u7ea6\u675f\uff08NOT NULL\uff09<\/strong>\uff1a\u786e\u4fdd\u5217\u4e0d\u80fd\u5305\u542b\u7a7a\u503c\u3002<\/li>\n
  •  \u4e3b\u952e\u7ea6\u675f\uff08PRIMARY KEY\uff09<\/strong>\uff1a\u6307\u5b9a\u552f\u4e00\u6807\u8bc6\u8868\u7684\u6bcf\u4e00\u884c\u7684\u4e00\u5217\u6216\u4e00\u7ec4\u5217\u3002<\/li>\n
  •  \u5916\u952e\u7ea6\u675f\uff08FOREIGN KEY\uff09<\/strong>\uff1a\u786e\u4fdd\u8868\u4e2d\u7684\u5217\u503c\u4e0e\u53e6\u4e00\u4e2a\u8868\u4e2d\u5217\u503c\u7684\u5b8c\u6574\u6027\uff0c\u9632\u6b62\u5728\u8868\u4e2d\u63d2\u5165\u6216\u66f4\u65b0\u4e0e\u53e6\u4e00\u4e2a\u8868\u4e2d\u4e0d\u5b58\u5728\u7684\u503c\u3002<\/li>\n
  •  \u552f\u4e00\u7ea6\u675f\uff08UNIQUE\uff09<\/strong>\uff1a\u6307\u5b9a\u8868\u4e2d\u7684\u5217\u503c\u5fc5\u987b\u662f\u552f\u4e00\u7684\u3002<\/li>\n
  •  \u68c0\u67e5\u7ea6\u675f\uff08CHECK\uff09<\/strong>\uff1a\u786e\u4fdd\u8868\u4e2d\u7684\u6570\u636e\u6ee1\u8db3\u6307\u5b9a\u7684\u6761\u4ef6\u6216\u8868\u8fbe\u5f0f\u3002<\/li>\n<\/ul>\n
    \u4f18\u70b9<\/strong><\/p>\n
    \u8bbe\u7f6e SQL \u5b8c\u6574\u6027\u7ea6\u675f\u53ef\u4ee5\u5e26\u6765\u4ee5\u4e0b\u4f18\u70b9\uff1a<\/p>\n
      \n
    • \u4fdd\u8bc1\u6570\u636e\u51c6\u786e\u6027\u548c\u4e00\u81f4\u6027\u3002<\/li>\n
    • \u9632\u6b62\u65e0\u6548\u6570\u636e\u8fdb\u5165\u6570\u636e\u5e93\u3002<\/li>\n
    • \u63d0\u9ad8\u6570\u636e\u5e93\u6027\u80fd\u3002<\/li>\n
    • \u7b80\u5316\u6570\u636e\u7ba1\u7406\u3002<\/li>\n<\/ul>\n
      \u6ce8\u610f<\/strong><\/p>\n
        \n
      • \u5b8c\u6574\u6027\u7ea6\u675f\u53ef\u80fd\u4f1a\u5f71\u54cd\u6570\u636e\u5e93\u6027\u80fd\u3002<\/li>\n
      • \u5728\u8bbe\u7f6e\u5b8c\u6574\u6027\u7ea6\u675f\u4e4b\u524d\uff0c\u5fc5\u987b\u4ed4\u7ec6\u8003\u8651\u5176\u5f71\u54cd\u3002<\/li>\n
      • \u5bf9\u4e8e\u9700\u8981\u7075\u6d3b\u5904\u7406\u7684\u6570\u636e\uff0c\u53ef\u4ee5\u4f7f\u7528\u66f4\u5bbd\u677e\u7684\u5b8c\u6574\u6027\u7ea6\u675f\u6216\u89e6\u53d1\u5668\u3002<\/li>\n<\/ul>\n
        \u4ee5\u4e0a\u5c31\u662fsql\u5b8c\u6574\u6027\u7ea6\u675f\u600e\u4e48\u8bbe\u7f6e\u7684\u8be6\u7ec6\u5185\u5bb9\uff0c\u66f4\u591a\u8bf7\u5173\u6ce8\u7c73\u4e91\u7f51\u5176\u5b83\u76f8\u5173\u6587\u7ae0\uff01<\/p>\n","protected":false},"excerpt":{"rendered":"
        sql \u5b8c\u6574\u6027\u7ea6\u675f\u662f\u4e00\u7ec4\u89c4\u5219\uff0c\u7528\u4e8e\u786e\u4fdd\u6570\u636e\u5e93\u4e2d\u6570\u636e\u7684\u51c6\u786e\u6027\u548c\u4e00\u81f4\u6027\u3002\u5b83\u53ef\u4ee5\u9632\u6b62\u4e0d\u4e00\u81f4\u548c\u65e0\u6548\u7684\u6570\u636e\u8fdb\u5165\u6570\u636e\u5e93\uff0c\u5e76\u901a\u8fc7\u4ee5\u4e0b\u8bed\u6cd5\u5728 create table \u8bed\u53e5\u4e2d\u8bbe\u7f6e\uff1a\u975e\u7a7a\u7ea6\u675f\uff1a\u786e\u4fdd\u5217\u4e0d\u80fd\u5305\u542b\u7a7a\u503c\u3002\u4e3b\u952e\u7ea6\u675f\uff1a\u6307\u5b9a\u552f\u4e00\u6807\u8bc6\u8868\u7684\u6bcf\u4e00\u884c\u7684\u4e00\u5217\u6216\u4e00\u7ec4\u5217\u3002\u5916\u952e\u7ea6\u675f\uff1a\u786e\u4fdd\u8868\u4e2d\u7684\u5217\u503c\u4e0e\u53e6\u4e00\u4e2a\u8868\u4e2d\u5217\u503c\u7684\u5b8c\u6574\u6027\u3002\u552f\u4e00\u7ea6\u675f\uff1a\u6307\u5b9a\u8868\u4e2d\u7684\u5217\u503c\u5fc5\u987b\u662f\u552f\u4e00\u7684\u3002\u68c0\u67e5\u7ea6\u675f\uff1a\u786e\u4fdd\u8868\u4e2d\u7684\u6570\u636e\u6ee1\u8db3\u6307\u5b9a\u7684\u6761\u4ef6\u6216\u8868\u8fbe\u5f0f\u3002 SQL \u5b8c\u6574\u6027\u7ea6\u675f \u4ec0\u4e48\u662f SQL \u5b8c\u6574\u6027\u7ea6\u675f\uff1f SQL \u5b8c\u6574\u6027\u7ea6\u675f\u662f\u4e00\u7ec4\u89c4\u5219\uff0c\u7528\u4e8e\u786e\u4fdd\u6570\u636e\u5e93\u4e2d\u7684\u6570\u636e\u51c6\u786e\u6027\u548c\u4e00\u81f4\u6027\u3002\u5b83\u6709\u52a9\u4e8e\u9632\u6b62\u4e0d\u4e00\u81f4\u548c\u65e0\u6548\u7684\u6570\u636e\u8fdb\u5165\u6570\u636e\u5e93\u3002 \u5982\u4f55\u8bbe\u7f6e SQL \u5b8c\u6574\u6027\u7ea6\u675f\uff1f \u5728 CREATE TABLE \u8bed\u53e5\u4e2d\uff0c\u53ef\u4ee5\u4f7f\u7528\u4ee5\u4e0b\u8bed\u6cd5\u8bbe\u7f6e SQL \u5b8c\u6574\u6027\u7ea6\u675f\uff1a CREATE TABLE table_name ( column_name data_type [NOT] NULL, [PRIMARY KEY (column_list)], [FOREIGN KEY (column_list) REFERENCES referenced_table (referenced_column_list)], [UNIQUE (column_list)], [CHECK (expression)] ); \u767b\u5f55\u540e\u590d\u5236 \u4e0d\u540c\u7c7b\u578b\u7684\u5b8c\u6574\u6027\u7ea6\u675f \u975e\u7a7a\u7ea6\u675f\uff08NOT NULL\uff09\uff1a\u786e\u4fdd\u5217\u4e0d\u80fd\u5305\u542b\u7a7a\u503c\u3002 \u4e3b\u952e\u7ea6\u675f\uff08PRIMARY KEY\uff09\uff1a\u6307\u5b9a\u552f\u4e00\u6807\u8bc6\u8868\u7684\u6bcf\u4e00\u884c\u7684\u4e00\u5217\u6216\u4e00\u7ec4\u5217\u3002 \u5916\u952e\u7ea6\u675f\uff08FOREIGN KEY\uff09\uff1a\u786e\u4fdd\u8868\u4e2d\u7684\u5217\u503c\u4e0e\u53e6\u4e00\u4e2a\u8868\u4e2d\u5217\u503c\u7684\u5b8c\u6574\u6027\uff0c\u9632\u6b62\u5728\u8868\u4e2d\u63d2\u5165\u6216\u66f4\u65b0\u4e0e\u53e6\u4e00\u4e2a\u8868\u4e2d\u4e0d\u5b58\u5728\u7684\u503c\u3002 \u552f\u4e00\u7ea6\u675f\uff08UNIQUE\uff09\uff1a\u6307\u5b9a\u8868\u4e2d\u7684\u5217\u503c\u5fc5\u987b\u662f\u552f\u4e00\u7684\u3002 \u68c0\u67e5\u7ea6\u675f\uff08CHECK\uff09\uff1a\u786e\u4fdd\u8868\u4e2d\u7684\u6570\u636e\u6ee1\u8db3\u6307\u5b9a\u7684\u6761\u4ef6\u6216\u8868\u8fbe\u5f0f\u3002 \u4f18\u70b9 \u8bbe\u7f6e […]<\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"closed","ping_status":"","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[16],"tags":[],"class_list":["post-5629","post","type-post","status-publish","format-standard","hentry","category-16"],"_links":{"self":[{"href":"https:\/\/fwq.ai\/blog\/wp-json\/wp\/v2\/posts\/5629","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/fwq.ai\/blog\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/fwq.ai\/blog\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/fwq.ai\/blog\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/fwq.ai\/blog\/wp-json\/wp\/v2\/comments?post=5629"}],"version-history":[{"count":0,"href":"https:\/\/fwq.ai\/blog\/wp-json\/wp\/v2\/posts\/5629\/revisions"}],"wp:attachment":[{"href":"https:\/\/fwq.ai\/blog\/wp-json\/wp\/v2\/media?parent=5629"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/fwq.ai\/blog\/wp-json\/wp\/v2\/categories?post=5629"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/fwq.ai\/blog\/wp-json\/wp\/v2\/tags?post=5629"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}