{"id":5973,"date":"2024-11-14T08:44:00","date_gmt":"2024-11-14T00:44:00","guid":{"rendered":"https:\/\/fwq.ai\/blog\/5973\/"},"modified":"2024-11-14T08:44:00","modified_gmt":"2024-11-14T00:44:00","slug":"sql%e5%a4%96%e9%94%ae%e7%ba%a6%e6%9d%9f%e4%bb%80%e4%b9%88%e6%84%8f%e6%80%9d","status":"publish","type":"post","link":"https:\/\/fwq.ai\/blog\/5973\/","title":{"rendered":"sql\u5916\u952e\u7ea6\u675f\u4ec0\u4e48\u610f\u601d"},"content":{"rendered":"<blockquote><p>\n  \u5916\u952e\u7ea6\u675f\u6307\u5b9a\u8868\u4e4b\u95f4\u5fc5\u987b\u5b58\u5728\u5f15\u7528\u5173\u7cfb\uff0c\u786e\u4fdd\u6570\u636e\u5b8c\u6574\u6027\u3001\u4e00\u81f4\u6027\u548c\u5f15\u7528\u5b8c\u6574\u6027\u3002\u5177\u4f53\u4f5c\u7528\u5305\u62ec\uff1a\u6570\u636e\u5b8c\u6574\u6027\uff1a\u5916\u952e\u503c\u5fc5\u987b\u5b58\u5728\u4e8e\u4e3b\u8868\u4e2d\uff0c\u9632\u6b62\u975e\u6cd5\u6570\u636e\u7684\u63d2\u5165\u6216\u66f4\u65b0\u3002\u6570\u636e\u4e00\u81f4\u6027\uff1a\u5f53\u4e3b\u8868\u6570\u636e\u53d8\u5316\u65f6\uff0c\u5916\u952e\u7ea6\u675f\u81ea\u52a8\u66f4\u65b0\u6216\u5220\u9664\u76f8\u5173\u6570\u636e\uff0c\u4fdd\u6301\u540c\u6b65\u3002\u6570\u636e\u5f15\u7528\uff1a\u5efa\u7acb\u8868\u4e4b\u95f4\u5173\u7cfb\uff0c\u7ef4\u62a4\u5f15\u7528\u5b8c\u6574\u6027\uff0c\u4fbf\u4e8e\u8ddf\u8e2a\u548c\u83b7\u53d6\u76f8\u5173\u6570\u636e\u3002\n<\/p><\/blockquote>\n<p><img decoding=\"async\" src=\"https:\/\/img.php.cn\/upload\/article\/202406\/12\/2024061203272168092.jpg\" class=\"aligncenter\" title=\"sql\u5916\u952e\u7ea6\u675f\u4ec0\u4e48\u610f\u601d\u63d2\u56fe\" alt=\"sql\u5916\u952e\u7ea6\u675f\u4ec0\u4e48\u610f\u601d\u63d2\u56fe\" \/><\/p>\n<p><strong>SQL \u5916\u952e\u7ea6\u675f\u7684\u542b\u4e49<\/strong><\/p>\n<p>\u5916\u952e\u7ea6\u675f\u662f\u4e00\u79cd\u6570\u636e\u5e93\u8868\u4e4b\u95f4\u7684\u5173\u7cfb\uff0c\u5b83\u6307\u5b9a\u4e00\u5217\u6216\u4e00\u7ec4\u5217\uff08\u5916\u952e\uff09\u5fc5\u987b\u5f15\u7528\u53e6\u4e00\u8868\uff08\u4e3b\u8868\uff09\u7684\u5217\uff08\u4e3b\u952e\uff09\u3002\u5176\u76ee\u7684\u662f\u786e\u4fdd\u6570\u636e\u7684\u4e00\u81f4\u6027\u548c\u5b8c\u6574\u6027\u3002<\/p>\n<p><strong>\u4f5c\u7528<\/strong><\/p>\n<p>\u5916\u952e\u7ea6\u675f\u6709\u51e0\u4e2a\u4e3b\u8981\u7684\u4f5c\u7528\uff1a<\/p>\n<ul>\n<li> <strong>\u6570\u636e\u5b8c\u6574\u6027\uff1a<\/strong>\u5916\u952e\u7ea6\u675f\u901a\u8fc7\u786e\u4fdd\u5916\u952e\u503c\u5728\u4e3b\u8868\u4e2d\u5b58\u5728\u6765\u9632\u6b62\u6570\u636e\u7684\u63d2\u5165\u6216\u66f4\u65b0\uff0c\u4ece\u800c\u7ef4\u62a4\u6570\u636e\u5b8c\u6574\u6027\u3002<\/li>\n<li> <strong>\u6570\u636e\u4e00\u81f4\u6027\uff1a<\/strong>\u5f53\u4e3b\u8868\u4e2d\u7684\u6570\u636e\u66f4\u6539\u65f6\uff0c\u5916\u952e\u7ea6\u675f\u4f1a\u81ea\u52a8\u7ea7\u8054\u66f4\u65b0\u6216\u5220\u9664\u76f8\u5173\u7684\u5916\u952e\u6570\u636e\uff0c\u4ee5\u4fdd\u6301\u6570\u636e\u4e4b\u95f4\u7684\u540c\u6b65\u3002<\/li>\n<li> <strong>\u6570\u636e\u5f15\u7528\uff1a<\/strong>\u5916\u952e\u7ea6\u675f\u6709\u52a9\u4e8e\u5efa\u7acb\u8868\u4e4b\u95f4\u7684\u5173\u7cfb\u5e76\u7ef4\u62a4\u5f15\u7528\u5b8c\u6574\u6027\uff0c\u8ba9\u60a8\u8f7b\u677e\u8ddf\u8e2a\u548c\u83b7\u53d6\u76f8\u5173\u6570\u636e\u3002<\/li>\n<\/ul>\n<p><strong>\u7c7b\u578b<\/strong><\/p>\n<p>SQL \u5916\u952e\u7ea6\u675f\u6709\u4e24\u79cd\u4e3b\u8981\u7c7b\u578b\uff1a<\/p>\n<ul>\n<li> <strong>\u5358\u7d14\u5916\u952e\uff1a<\/strong>\u5916\u952e\u5f15\u7528\u4e3b\u8868\u7684\u5355\u4e2a\u5217\u3002<\/li>\n<li> <strong>\u53c2\u7167\u5916\u952e\uff1a<\/strong>\u5916\u952e\u5f15\u7528\u4e3b\u8868\u7684\u591a\u5217\u3002<\/li>\n<\/ul>\n<p><strong>\u8bed\u6cd5<\/strong><\/p>\n<p>\u5728\u4e00\u4e2a SQL CREATE TABLE \u8bed\u53e5\u4e2d\uff0c\u60a8\u53ef\u4ee5\u4f7f\u7528 FOREIGN KEY \u5b50\u53e5\u6765\u5b9a\u4e49\u5916\u952e\u7ea6\u675f\u3002\u8bed\u6cd5\u5982\u4e0b\uff1a<\/p>\n<pre>FOREIGN KEY (column_name) REFERENCES table_name (primary_key_column_name)<\/pre>\n<p>  \u767b\u5f55\u540e\u590d\u5236   <\/p>\n<p>\u5176\u4e2d\uff1a<\/p>\n<ul>\n<li>column_name \u662f\u5916\u952e\u5217\u3002<\/li>\n<li>table_name \u662f\u4e3b\u8868\u540d\u3002<\/li>\n<li>primary_key_column_name \u662f\u4e3b\u8868\u4e2d\u7684\u4e3b\u952e\u5217\u3002<\/li>\n<\/ul>\n<p><strong>\u5b9e\u4f8b<\/strong><\/p>\n<p>\u4f8b\u5982\uff0c\u5982\u679c\u6211\u4eec\u6709\u4e00\u4e2a\u540d\u4e3a Orders \u7684\u8868\u548c\u4e00\u4e2a\u540d\u4e3a Products \u7684\u4e3b\u8868\uff0c\u5219\u53ef\u4ee5\u521b\u5efa\u4ee5\u4e0b\u5916\u952e\u7ea6\u675f\uff1a<\/p>\n<pre>CREATE TABLE Orders (\n  order_id INT PRIMARY KEY,\n  product_id INT NOT NULL,\n  FOREIGN KEY (product_id) REFERENCES Products (product_id)\n);<\/pre>\n<p>  \u767b\u5f55\u540e\u590d\u5236   <\/p>\n<p>\u6b64\u5916\u952e\u7ea6\u675f\u786e\u4fdd Orders \u8868\u4e2d\u7684\u6bcf\u4e2a product_id \u503c\u90fd\u5b58\u5728\u4e8e Products \u8868\u4e2d\u3002<\/p>\n<p>\u4ee5\u4e0a\u5c31\u662fsql\u5916\u952e\u7ea6\u675f\u4ec0\u4e48\u610f\u601d\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":"<p>\u5916\u952e\u7ea6\u675f\u6307\u5b9a\u8868\u4e4b\u95f4\u5fc5\u987b\u5b58\u5728\u5f15\u7528\u5173\u7cfb\uff0c\u786e\u4fdd\u6570\u636e\u5b8c\u6574\u6027\u3001\u4e00\u81f4\u6027\u548c\u5f15\u7528\u5b8c\u6574\u6027\u3002\u5177\u4f53\u4f5c\u7528\u5305\u62ec\uff1a\u6570\u636e\u5b8c\u6574\u6027\uff1a\u5916\u952e\u503c\u5fc5\u987b\u5b58\u5728\u4e8e\u4e3b\u8868\u4e2d\uff0c\u9632\u6b62\u975e\u6cd5\u6570\u636e\u7684\u63d2\u5165\u6216\u66f4\u65b0\u3002\u6570\u636e\u4e00\u81f4\u6027\uff1a\u5f53\u4e3b\u8868\u6570\u636e\u53d8\u5316\u65f6\uff0c\u5916\u952e\u7ea6\u675f\u81ea\u52a8\u66f4\u65b0\u6216\u5220\u9664\u76f8\u5173\u6570\u636e\uff0c\u4fdd\u6301\u540c\u6b65\u3002\u6570\u636e\u5f15\u7528\uff1a\u5efa\u7acb\u8868\u4e4b\u95f4\u5173\u7cfb\uff0c\u7ef4\u62a4\u5f15\u7528\u5b8c\u6574\u6027\uff0c\u4fbf\u4e8e\u8ddf\u8e2a\u548c\u83b7\u53d6\u76f8\u5173\u6570\u636e\u3002 SQL \u5916\u952e\u7ea6\u675f\u7684\u542b\u4e49 \u5916\u952e\u7ea6\u675f\u662f\u4e00\u79cd\u6570\u636e\u5e93\u8868\u4e4b\u95f4\u7684\u5173\u7cfb\uff0c\u5b83\u6307\u5b9a\u4e00\u5217\u6216\u4e00\u7ec4\u5217\uff08\u5916\u952e\uff09\u5fc5\u987b\u5f15\u7528\u53e6\u4e00\u8868\uff08\u4e3b\u8868\uff09\u7684\u5217\uff08\u4e3b\u952e\uff09\u3002\u5176\u76ee\u7684\u662f\u786e\u4fdd\u6570\u636e\u7684\u4e00\u81f4\u6027\u548c\u5b8c\u6574\u6027\u3002 \u4f5c\u7528 \u5916\u952e\u7ea6\u675f\u6709\u51e0\u4e2a\u4e3b\u8981\u7684\u4f5c\u7528\uff1a \u6570\u636e\u5b8c\u6574\u6027\uff1a\u5916\u952e\u7ea6\u675f\u901a\u8fc7\u786e\u4fdd\u5916\u952e\u503c\u5728\u4e3b\u8868\u4e2d\u5b58\u5728\u6765\u9632\u6b62\u6570\u636e\u7684\u63d2\u5165\u6216\u66f4\u65b0\uff0c\u4ece\u800c\u7ef4\u62a4\u6570\u636e\u5b8c\u6574\u6027\u3002 \u6570\u636e\u4e00\u81f4\u6027\uff1a\u5f53\u4e3b\u8868\u4e2d\u7684\u6570\u636e\u66f4\u6539\u65f6\uff0c\u5916\u952e\u7ea6\u675f\u4f1a\u81ea\u52a8\u7ea7\u8054\u66f4\u65b0\u6216\u5220\u9664\u76f8\u5173\u7684\u5916\u952e\u6570\u636e\uff0c\u4ee5\u4fdd\u6301\u6570\u636e\u4e4b\u95f4\u7684\u540c\u6b65\u3002 \u6570\u636e\u5f15\u7528\uff1a\u5916\u952e\u7ea6\u675f\u6709\u52a9\u4e8e\u5efa\u7acb\u8868\u4e4b\u95f4\u7684\u5173\u7cfb\u5e76\u7ef4\u62a4\u5f15\u7528\u5b8c\u6574\u6027\uff0c\u8ba9\u60a8\u8f7b\u677e\u8ddf\u8e2a\u548c\u83b7\u53d6\u76f8\u5173\u6570\u636e\u3002 \u7c7b\u578b SQL \u5916\u952e\u7ea6\u675f\u6709\u4e24\u79cd\u4e3b\u8981\u7c7b\u578b\uff1a \u5358\u7d14\u5916\u952e\uff1a\u5916\u952e\u5f15\u7528\u4e3b\u8868\u7684\u5355\u4e2a\u5217\u3002 \u53c2\u7167\u5916\u952e\uff1a\u5916\u952e\u5f15\u7528\u4e3b\u8868\u7684\u591a\u5217\u3002 \u8bed\u6cd5 \u5728\u4e00\u4e2a SQL CREATE TABLE \u8bed\u53e5\u4e2d\uff0c\u60a8\u53ef\u4ee5\u4f7f\u7528 FOREIGN KEY \u5b50\u53e5\u6765\u5b9a\u4e49\u5916\u952e\u7ea6\u675f\u3002\u8bed\u6cd5\u5982\u4e0b\uff1a FOREIGN KEY (column_name) REFERENCES table_name (primary_key_column_name) \u767b\u5f55\u540e\u590d\u5236 \u5176\u4e2d\uff1a column_name \u662f\u5916\u952e\u5217\u3002 table_name \u662f\u4e3b\u8868\u540d\u3002 primary_key_column_name \u662f\u4e3b\u8868\u4e2d\u7684\u4e3b\u952e\u5217\u3002 \u5b9e\u4f8b \u4f8b\u5982\uff0c\u5982\u679c\u6211\u4eec\u6709\u4e00\u4e2a\u540d\u4e3a Orders \u7684\u8868\u548c\u4e00\u4e2a\u540d\u4e3a Products \u7684\u4e3b\u8868\uff0c\u5219\u53ef\u4ee5\u521b\u5efa\u4ee5\u4e0b\u5916\u952e\u7ea6\u675f\uff1a CREATE TABLE Orders ( order_id INT PRIMARY KEY, product_id INT NOT NULL, [&hellip;]<\/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-5973","post","type-post","status-publish","format-standard","hentry","category-16"],"_links":{"self":[{"href":"https:\/\/fwq.ai\/blog\/wp-json\/wp\/v2\/posts\/5973","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=5973"}],"version-history":[{"count":0,"href":"https:\/\/fwq.ai\/blog\/wp-json\/wp\/v2\/posts\/5973\/revisions"}],"wp:attachment":[{"href":"https:\/\/fwq.ai\/blog\/wp-json\/wp\/v2\/media?parent=5973"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/fwq.ai\/blog\/wp-json\/wp\/v2\/categories?post=5973"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/fwq.ai\/blog\/wp-json\/wp\/v2\/tags?post=5973"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}