{"id":179980,"date":"2024-11-09T06:24:17","date_gmt":"2024-11-08T22:24:17","guid":{"rendered":"https:\/\/server.hk\/cnblog\/179980\/"},"modified":"2024-11-09T06:24:18","modified_gmt":"2024-11-08T22:24:18","slug":"%e5%a6%82%e4%bd%95%e6%ad%a3%e7%a2%ba%e5%bb%ba%e7%ab%8b%e6%95%b8%e6%93%9a%e5%ba%ab%e5%a4%96%e9%8d%b5%ef%bc%9f-%e6%95%b8%e6%93%9a%e5%ba%ab%e5%bb%ba%e7%ab%8b%e5%a4%96%e9%8d%b5","status":"publish","type":"post","link":"https:\/\/server.hk\/cnblog\/179980\/","title":{"rendered":"\u5982\u4f55\u6b63\u78ba\u5efa\u7acb\u6578\u64da\u5eab\u5916\u9375\uff1f (\u6578\u64da\u5eab\u5efa\u7acb\u5916\u9375)"},"content":{"rendered":"

\u5982\u4f55\u6b63\u78ba\u5efa\u7acb\u6578\u64da\u5eab\u5916\u9375\uff1f (\u6578\u64da\u5eab\u5efa\u7acb\u5916\u9375)<\/h1>\n

\u5728\u6578\u64da\u5eab\u8a2d\u8a08\u4e2d\uff0c\u5916\u9375\u662f\u4e00\u500b\u91cd\u8981\u7684\u6982\u5ff5\uff0c\u5b83\u7528\u65bc\u5efa\u7acb\u8868\u4e4b\u9593\u7684\u95dc\u806f\u6027\u3002\u6b63\u78ba\u5730\u5efa\u7acb\u5916\u9375\u4e0d\u50c5\u80fd\u5920\u78ba\u4fdd\u6578\u64da\u7684\u5b8c\u6574\u6027\uff0c\u9084\u80fd\u63d0\u9ad8\u67e5\u8a62\u7684\u6548\u7387\u3002\u672c\u6587\u5c07\u6df1\u5165\u63a2\u8a0e\u5982\u4f55\u6b63\u78ba\u5efa\u7acb\u6578\u64da\u5eab\u5916\u9375\uff0c\u4e26\u63d0\u4f9b\u5be6\u7528\u7684\u793a\u4f8b\u548c\u5efa\u8b70\u3002<\/p>\n

\u4ec0\u9ebc\u662f\u5916\u9375\uff1f<\/h2>\n

\u5916\u9375\u662f\u6307\u4e00\u500b\u8868\u4e2d\u7684\u4e00\u500b\u6216\u591a\u500b\u5b57\u6bb5\uff0c\u9019\u4e9b\u5b57\u6bb5\u7528\u4f86\u53c3\u8003\u53e6\u4e00\u500b\u8868\u4e2d\u7684\u4e3b\u9375\u3002\u5916\u9375\u7684\u4e3b\u8981\u4f5c\u7528\u662f\u7dad\u8b77\u6578\u64da\u7684\u53c3\u7167\u5b8c\u6574\u6027\uff0c\u78ba\u4fdd\u6578\u64da\u4e4b\u9593\u7684\u95dc\u806f\u6027\u3002\u4f8b\u5982\uff0c\u5728\u4e00\u500b\u8a02\u55ae\u7cfb\u7d71\u4e2d\uff0c\u8a02\u55ae\u8868\u53ef\u80fd\u6703\u6709\u4e00\u500b\u5916\u9375\u5b57\u6bb5\u4f86\u53c3\u8003\u5ba2\u6236\u8868\u7684\u4e3b\u9375\uff0c\u9019\u6a23\u53ef\u4ee5\u78ba\u4fdd\u6bcf\u500b\u8a02\u55ae\u90fd\u5c0d\u61c9\u4e00\u500b\u6709\u6548\u7684\u5ba2\u6236\u3002<\/p>\n

\u5efa\u7acb\u5916\u9375\u7684\u6b65\u9a5f<\/h2>\n

1. \u78ba\u5b9a\u8868\u7d50\u69cb<\/h3>\n

\u5728\u5efa\u7acb\u5916\u9375\u4e4b\u524d\uff0c\u9996\u5148\u9700\u8981\u78ba\u5b9a\u6d89\u53ca\u7684\u8868\u7d50\u69cb\u3002\u5047\u8a2d\u6211\u5011\u6709\u5169\u500b\u8868\uff1acustomers<\/code>\uff08\u5ba2\u6236\u8868\uff09\u548c orders<\/code>\uff08\u8a02\u55ae\u8868\uff09\u3002\u5ba2\u6236\u8868\u7684\u4e3b\u9375\u662f customer_id<\/code>\uff0c\u800c\u8a02\u55ae\u8868\u4e2d\u9700\u8981\u6709\u4e00\u500b\u5916\u9375\u5b57\u6bb5\u4f86\u53c3\u8003\u9019\u500b\u4e3b\u9375\u3002<\/p>\n

2. \u5b9a\u7fa9\u5916\u9375\u5b57\u6bb5<\/h3>\n

\u5728\u8a02\u55ae\u8868\u4e2d\uff0c\u6211\u5011\u9700\u8981\u6dfb\u52a0\u4e00\u500b\u5916\u9375\u5b57\u6bb5\uff0c\u901a\u5e38\u547d\u540d\u70ba customer_id<\/code>\u3002\u9019\u500b\u5b57\u6bb5\u7684\u6578\u64da\u985e\u578b\u5fc5\u9808\u8207\u5ba2\u6236\u8868\u7684\u4e3b\u9375\u6578\u64da\u985e\u578b\u76f8\u540c\u3002<\/p>\n

3. \u4f7f\u7528 SQL \u8a9e\u53e5\u5efa\u7acb\u5916\u9375<\/h3>\n

\u53ef\u4ee5\u4f7f\u7528 SQL \u8a9e\u53e5\u4f86\u5efa\u7acb\u5916\u9375\u3002\u4ee5\u4e0b\u662f\u4e00\u500b\u793a\u4f8b\uff1a<\/p>\n

CREATE TABLE customers (\n    customer_id INT PRIMARY KEY,\n    customer_name VARCHAR(100)\n);\n\nCREATE TABLE orders (\n    order_id INT PRIMARY KEY,\n    order_date DATE,\n    customer_id INT,\n    FOREIGN KEY (customer_id) REFERENCES customers(customer_id)\n);<\/code><\/pre>\n
\u5728\u9019\u500b\u793a\u4f8b\u4e2d\uff0c\u6211\u5011\u9996\u5148\u5275\u5efa\u4e86 customers<\/code> \u8868\uff0c\u7136\u5f8c\u5275\u5efa\u4e86 orders<\/code> \u8868\uff0c\u4e26\u5728 orders<\/code> \u8868\u4e2d\u5b9a\u7fa9\u4e86\u5916\u9375 customer_id<\/code>\uff0c\u5b83\u53c3\u8003\u4e86 customers<\/code> \u8868\u7684 customer_id<\/code>\u3002<\/p>\n
\u5916\u9375\u7684\u6ce8\u610f\u4e8b\u9805<\/h2>\n
1. \u6578\u64da\u985e\u578b\u4e00\u81f4\u6027<\/h3>\n
\u78ba\u4fdd\u5916\u9375\u5b57\u6bb5\u7684\u6578\u64da\u985e\u578b\u8207\u53c3\u8003\u7684\u4e3b\u9375\u5b57\u6bb5\u4e00\u81f4\uff0c\u9019\u6a23\u53ef\u4ee5\u907f\u514d\u6578\u64da\u985e\u578b\u4e0d\u5339\u914d\u7684\u554f\u984c\u3002<\/p>\n
2. \u53c3\u7167\u5b8c\u6574\u6027<\/h3>\n
\u5916\u9375\u7684\u4e3b\u8981\u76ee\u7684\u662f\u7dad\u8b77\u53c3\u7167\u5b8c\u6574\u6027\uff0c\u56e0\u6b64\u5728\u63d2\u5165\u6216\u66f4\u65b0\u6578\u64da\u6642\uff0c\u5fc5\u9808\u78ba\u4fdd\u5916\u9375\u5b57\u6bb5\u7684\u503c\u5728\u53c3\u8003\u8868\u4e2d\u5b58\u5728\u3002<\/p>\n
3. \u8655\u7406\u522a\u9664\u548c\u66f4\u65b0\u64cd\u4f5c<\/h3>\n
\u5728\u5efa\u7acb\u5916\u9375\u6642\uff0c\u53ef\u4ee5\u9078\u64c7\u8a2d\u7f6e\u522a\u9664\u548c\u66f4\u65b0\u64cd\u4f5c\u7684\u884c\u70ba\u3002\u4f8b\u5982\uff0c\u53ef\u4ee5\u8a2d\u7f6e\u70ba ON DELETE CASCADE<\/code>\uff0c\u9019\u6a23\u7576\u5ba2\u6236\u88ab\u522a\u9664\u6642\uff0c\u6240\u6709\u76f8\u95dc\u7684\u8a02\u55ae\u4e5f\u6703\u81ea\u52d5\u522a\u9664\u3002\u4ee5\u4e0b\u662f\u793a\u4f8b\uff1a<\/p>\n
FOREIGN KEY (customer_id) REFERENCES customers(customer_id) ON DELETE CASCADE<\/code><\/pre>\n
\u7d50\u8ad6<\/h2>\n
\u6b63\u78ba\u5efa\u7acb\u6578\u64da\u5eab\u5916\u9375\u662f\u6578\u64da\u5eab\u8a2d\u8a08\u4e2d\u7684\u4e00\u500b\u91cd\u8981\u6b65\u9a5f\uff0c\u5b83\u6709\u52a9\u65bc\u7dad\u8b77\u6578\u64da\u7684\u5b8c\u6574\u6027\u548c\u4e00\u81f4\u6027\u3002\u901a\u904e\u9075\u5faa\u4e0a\u8ff0\u6b65\u9a5f\u548c\u6ce8\u610f\u4e8b\u9805\uff0c\u60a8\u53ef\u4ee5\u6709\u6548\u5730\u7ba1\u7406\u6578\u64da\u4e4b\u9593\u7684\u95dc\u806f\u6027\uff0c\u5f9e\u800c\u63d0\u9ad8\u6578\u64da\u5eab\u7684\u6027\u80fd\u548c\u53ef\u9760\u6027\u3002<\/p>\n
\u5982\u679c\u60a8\u5c0d\u65bc\u6578\u64da\u5eab\u7ba1\u7406\u6216\u5176\u4ed6\u6280\u8853\u554f\u984c\u6709\u9032\u4e00\u6b65\u7684\u9700\u6c42\uff0c\u6b61\u8fce\u8a2a\u554f\u6211\u5011\u7684\u7db2\u7ad9\u4e86\u89e3\u66f4\u591a\u8cc7\u8a0a\u3002\u6211\u5011\u63d0\u4f9b\u5404\u7a2e VPS<\/a> \u89e3\u6c7a\u65b9\u6848\uff0c\u5e6b\u52a9\u60a8\u5728\u9999\u6e2f\u5efa\u7acb\u7a69\u5b9a\u7684\u4f3a\u670d\u5668\u74b0\u5883\u3002<\/p>\n","protected":false},"excerpt":{"rendered":"
\u5b78\u7fd2\u5982\u4f55\u6b63\u78ba\u5efa\u7acb\u6578\u64da\u5eab\u5916\u9375\uff0c\u78ba\u4fdd\u6578\u64da\u5b8c\u6574\u6027\u8207\u95dc\u806f\u6027\uff0c\u63d0\u5347\u6578\u64da\u5eab\u8a2d\u8a08\u7684\u6548\u7387\u8207\u7a69\u5b9a\u6027\u3002<\/p>\n","protected":false},"author":0,"featured_media":0,"comment_status":"closed","ping_status":"","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[101],"tags":[],"class_list":["post-179980","post","type-post","status-publish","format-standard","hentry","category-database"],"_links":{"self":[{"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/posts\/179980","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/types\/post"}],"replies":[{"embeddable":true,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/comments?post=179980"}],"version-history":[{"count":1,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/posts\/179980\/revisions"}],"predecessor-version":[{"id":179981,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/posts\/179980\/revisions\/179981"}],"wp:attachment":[{"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/media?parent=179980"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/categories?post=179980"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/tags?post=179980"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}