{"id":193967,"date":"2024-11-13T02:39:20","date_gmt":"2024-11-12T18:39:20","guid":{"rendered":"https:\/\/server.hk\/cnblog\/193967\/"},"modified":"2024-11-13T02:39:21","modified_gmt":"2024-11-12T18:39:21","slug":"%e4%b8%80%e5%b0%8d%e5%a4%9a%e6%95%b8%e6%93%9a%e5%ba%ab%e8%a8%ad%e8%a8%88%e5%8e%9f%e5%89%87%e5%8f%8a%e6%87%89%e7%94%a8%e8%88%89%e4%be%8b%ef%bc%88%e6%95%b8%e6%93%9a%e5%ba%ab%e8%a8%ad%e8%a8%88%e4%b8%80","status":"publish","type":"post","link":"https:\/\/server.hk\/cnblog\/193967\/","title":{"rendered":"\u4e00\u5c0d\u591a\u6578\u64da\u5eab\u8a2d\u8a08\u539f\u5247\u53ca\u61c9\u7528\u8209\u4f8b\uff08\u6578\u64da\u5eab\u8a2d\u8a08\u4e00\u5c0d\u591a\uff09"},"content":{"rendered":"

\u4e00\u5c0d\u591a\u6578\u64da\u5eab\u8a2d\u8a08\u539f\u5247\u53ca\u61c9\u7528\u8209\u4f8b\uff08\u6578\u64da\u5eab\u8a2d\u8a08\u4e00\u5c0d\u591a\uff09<\/h1>\n

\u5728\u6578\u64da\u5eab\u8a2d\u8a08\u4e2d\uff0c\u4e00\u5c0d\u591a\uff08One-to-Many\uff09\u95dc\u4fc2\u662f\u6700\u5e38\u898b\u7684\u6578\u64da\u6a21\u578b\u4e4b\u4e00\u3002\u9019\u7a2e\u95dc\u4fc2\u6307\u7684\u662f\u4e00\u500b\u5be6\u9ad4\u53ef\u4ee5\u8207\u591a\u500b\u5176\u4ed6\u5be6\u9ad4\u76f8\u95dc\u806f\uff0c\u800c\u9019\u4e9b\u5176\u4ed6\u5be6\u9ad4\u53ea\u80fd\u8207\u4e00\u500b\u5be6\u9ad4\u76f8\u95dc\u806f\u3002\u7406\u89e3\u4e00\u5c0d\u591a\u95dc\u4fc2\u7684\u8a2d\u8a08\u539f\u5247\u5c0d\u65bc\u69cb\u5efa\u9ad8\u6548\u7684\u6578\u64da\u5eab\u7cfb\u7d71\u81f3\u95dc\u91cd\u8981\u3002<\/p>\n

\u4e00\u5c0d\u591a\u95dc\u4fc2\u7684\u57fa\u672c\u6982\u5ff5<\/h2>\n

\u5728\u4e00\u5c0d\u591a\u95dc\u4fc2\u4e2d\uff0c\u901a\u5e38\u6709\u5169\u500b\u8868\uff1a\u4e3b\u8868\u548c\u5f9e\u8868\u3002\u4e3b\u8868\u4e2d\u7684\u6bcf\u4e00\u884c\u53ef\u4ee5\u5728\u5f9e\u8868\u4e2d\u627e\u5230\u591a\u884c\u7684\u5c0d\u61c9\u6578\u64da\u3002\u4f8b\u5982\uff0c\u8003\u616e\u4e00\u500b\u300c\u5ba2\u6236\u300d\u8868\u548c\u4e00\u500b\u300c\u8a02\u55ae\u300d\u8868\u3002\u5728\u9019\u500b\u4f8b\u5b50\u4e2d\uff0c\u6bcf\u500b\u5ba2\u6236\u53ef\u4ee5\u6709\u591a\u500b\u8a02\u55ae\uff0c\u4f46\u6bcf\u500b\u8a02\u55ae\u53ea\u80fd\u5c6c\u65bc\u4e00\u500b\u5ba2\u6236\u3002<\/p>\n

\u6578\u64da\u5eab\u8a2d\u8a08\u793a\u4f8b<\/h3>\n

\u4ee5\u4e0b\u662f\u4e00\u500b\u7c21\u55ae\u7684\u6578\u64da\u5eab\u8a2d\u8a08\u793a\u4f8b\uff0c\u5c55\u793a\u5982\u4f55\u5be6\u73fe\u4e00\u5c0d\u591a\u95dc\u4fc2\uff1a<\/p>\n

CREATE TABLE Customers (\n    CustomerID INT PRIMARY KEY,\n    CustomerName VARCHAR(100),\n    ContactEmail VARCHAR(100)\n);\n\nCREATE TABLE Orders (\n    OrderID INT PRIMARY KEY,\n    OrderDate DATE,\n    CustomerID INT,\n    FOREIGN KEY (CustomerID) REFERENCES Customers(CustomerID)\n);\n<\/code><\/pre>\n
\u5728\u9019\u500b\u4f8b\u5b50\u4e2d\uff0cCustomers<\/code> \u8868\u662f\u4e3b\u8868\uff0c\u800c Orders<\/code> \u8868\u662f\u5f9e\u8868\u3002CustomerID<\/code> \u5728 Orders<\/code> \u8868\u4e2d\u4f5c\u70ba\u5916\u9375\uff0c\u6307\u5411 Customers<\/code> \u8868\u4e2d\u7684\u4e3b\u9375\u3002<\/p>\n
\u4e00\u5c0d\u591a\u95dc\u4fc2\u7684\u8a2d\u8a08\u539f\u5247<\/h2>\n
1. \u78ba\u5b9a\u5be6\u9ad4\u53ca\u5176\u95dc\u4fc2<\/h3>\n
\u5728\u8a2d\u8a08\u6578\u64da\u5eab\u4e4b\u524d\uff0c\u9996\u5148\u9700\u8981\u78ba\u5b9a\u5be6\u9ad4\u53ca\u5176\u4e4b\u9593\u7684\u95dc\u4fc2\u3002\u9019\u53ef\u4ee5\u901a\u904e\u9700\u6c42\u5206\u6790\u548c\u696d\u52d9\u6d41\u7a0b\u7684\u7406\u89e3\u4f86\u5b8c\u6210\u3002\u78ba\u4fdd\u6bcf\u500b\u5be6\u9ad4\u7684\u5c6c\u6027\u6e05\u6670\u660e\u78ba\uff0c\u4e26\u4e14\u80fd\u5920\u6b63\u78ba\u53cd\u6620\u696d\u52d9\u9700\u6c42\u3002<\/p>\n
2. \u4f7f\u7528\u5916\u9375\u4f86\u7dad\u8b77\u95dc\u806f<\/h3>\n
\u5728\u4e00\u5c0d\u591a\u95dc\u4fc2\u4e2d\uff0c\u5f9e\u8868\u9700\u8981\u5305\u542b\u4e00\u500b\u5916\u9375\u4f86\u6307\u5411\u4e3b\u8868\u7684\u4e3b\u9375\u3002\u9019\u6a23\u53ef\u4ee5\u78ba\u4fdd\u6578\u64da\u7684\u5b8c\u6574\u6027\uff0c\u4e26\u4e14\u80fd\u5920\u901a\u904e\u5916\u9375\u9032\u884c\u67e5\u8a62\u3002<\/p>\n
3. \u8003\u616e\u6578\u64da\u7684\u5b8c\u6574\u6027\u548c\u4e00\u81f4\u6027<\/h3>\n
\u5728\u8a2d\u8a08\u6578\u64da\u5eab\u6642\uff0c\u5fc5\u9808\u8003\u616e\u6578\u64da\u7684\u5b8c\u6574\u6027\u548c\u4e00\u81f4\u6027\u3002\u4f7f\u7528\u7d04\u675f\uff08\u5982\u5916\u9375\u7d04\u675f\uff09\u4f86\u9632\u6b62\u4e0d\u4e00\u81f4\u7684\u6578\u64da\u9032\u5165\u6578\u64da\u5eab\u3002\u4f8b\u5982\uff0c\u7576\u522a\u9664\u4e00\u500b\u5ba2\u6236\u6642\uff0c\u61c9\u8a72\u8003\u616e\u5982\u4f55\u8655\u7406\u8a72\u5ba2\u6236\u7684\u6240\u6709\u8a02\u55ae\u3002<\/p>\n
4. \u512a\u5316\u67e5\u8a62\u6027\u80fd<\/h3>\n
\u5728\u8a2d\u8a08\u4e00\u5c0d\u591a\u95dc\u4fc2\u6642\uff0c\u61c9\u8003\u616e\u67e5\u8a62\u6027\u80fd\u3002\u53ef\u4ee5\u901a\u904e\u5efa\u7acb\u7d22\u5f15\u4f86\u52a0\u901f\u67e5\u8a62\uff0c\u7279\u5225\u662f\u5728\u5f9e\u8868\u4e2d\u67e5\u8a62\u4e3b\u8868\u7684\u6578\u64da\u6642\u3002<\/p>\n
\u61c9\u7528\u8209\u4f8b<\/h2>\n
\u5047\u8a2d\u6211\u5011\u6b63\u5728\u958b\u767c\u4e00\u500b\u96fb\u5b50\u5546\u52d9\u5e73\u53f0\uff0c\u4e26\u9700\u8981\u7ba1\u7406\u5ba2\u6236\u548c\u8a02\u55ae\u7684\u6578\u64da\u3002\u5728\u9019\u7a2e\u60c5\u6cc1\u4e0b\uff0c\u6211\u5011\u53ef\u4ee5\u4f7f\u7528\u4e00\u5c0d\u591a\u95dc\u4fc2\u4f86\u8a2d\u8a08\u6578\u64da\u5eab\u3002\u6bcf\u500b\u5ba2\u6236\u53ef\u4ee5\u4e0b\u591a\u500b\u8a02\u55ae\uff0c\u800c\u6bcf\u500b\u8a02\u55ae\u53ea\u80fd\u5c6c\u65bc\u4e00\u500b\u5ba2\u6236\u3002<\/p>\n
\u7576\u7528\u6236\u67e5\u8a62\u67d0\u500b\u5ba2\u6236\u7684\u6240\u6709\u8a02\u55ae\u6642\uff0c\u53ef\u4ee5\u4f7f\u7528\u4ee5\u4e0b SQL \u67e5\u8a62\uff1a<\/p>\n
SELECT Orders.OrderID, Orders.OrderDate\nFROM Orders\nJOIN Customers ON Orders.CustomerID = Customers.CustomerID\nWHERE Customers.CustomerID = 1;\n<\/code><\/pre>\n
\u9019\u500b\u67e5\u8a62\u5c07\u8fd4\u56de\u5ba2\u6236 ID \u70ba 1 \u7684\u6240\u6709\u8a02\u55ae\uff0c\u5c55\u793a\u4e86\u5982\u4f55\u5229\u7528\u4e00\u5c0d\u591a\u95dc\u4fc2\u4f86\u7372\u53d6\u76f8\u95dc\u6578\u64da\u3002<\/p>\n
\u7e3d\u7d50<\/h2>\n
\u4e00\u5c0d\u591a\u6578\u64da\u5eab\u8a2d\u8a08\u662f\u6578\u64da\u5eab\u5efa\u6a21\u4e2d\u7684\u4e00\u500b\u91cd\u8981\u6982\u5ff5\uff0c\u6b63\u78ba\u7684\u8a2d\u8a08\u539f\u5247\u80fd\u5920\u63d0\u9ad8\u6578\u64da\u7684\u5b8c\u6574\u6027\u548c\u67e5\u8a62\u6027\u80fd\u3002\u5728\u9999\u6e2f\u7684\u6578\u64da\u4e2d\u5fc3\u4e2d\uff0c\u9078\u64c7\u5408\u9069\u7684 VPS<\/a> \u65b9\u6848\u53ef\u4ee5\u5e6b\u52a9\u4f01\u696d\u66f4\u597d\u5730\u7ba1\u7406\u5176\u6578\u64da\u5eab\u7cfb\u7d71\uff0c\u78ba\u4fdd\u696d\u52d9\u904b\u884c\u7684\u7a69\u5b9a\u6027\u548c\u6548\u7387\u3002\u4e86\u89e3\u4e00\u5c0d\u591a\u95dc\u4fc2\u7684\u8a2d\u8a08\u539f\u5247\uff0c\u5c07\u6709\u52a9\u65bc\u958b\u767c\u51fa\u66f4\u9ad8\u6548\u7684\u6578\u64da\u5eab\u61c9\u7528\u3002<\/p>\n","protected":false},"excerpt":{"rendered":"
\u63a2\u7d22\u4e00\u5c0d\u591a\u6578\u64da\u5eab\u8a2d\u8a08\u539f\u5247\u53ca\u5be6\u969b\u61c9\u7528\u8209\u4f8b\uff0c\u63d0\u5347\u6578\u64da\u7ba1\u7406\u6548\u7387\u8207\u7d50\u69cb\u5316\u80fd\u529b\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-193967","post","type-post","status-publish","format-standard","hentry","category-database"],"_links":{"self":[{"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/posts\/193967","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=193967"}],"version-history":[{"count":1,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/posts\/193967\/revisions"}],"predecessor-version":[{"id":193968,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/posts\/193967\/revisions\/193968"}],"wp:attachment":[{"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/media?parent=193967"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/categories?post=193967"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/tags?post=193967"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}