{"id":175065,"date":"2024-11-08T02:22:29","date_gmt":"2024-11-07T18:22:29","guid":{"rendered":"https:\/\/server.hk\/cnblog\/175065\/"},"modified":"2024-11-08T02:22:30","modified_gmt":"2024-11-07T18:22:30","slug":"%e5%a6%82%e4%bd%95%e8%a8%ad%e7%bd%ae%e4%b8%bb%e9%8d%b5%e5%9c%a8%e6%95%b8%e6%93%9a%e5%ba%ab%e4%b8%ad%e4%bf%9d%e8%ad%89%e6%95%b8%e6%93%9a%e5%ae%8c%e6%95%b4%e6%80%a7-%e8%a8%ad%e7%bd%ae%e4%b8%bb%e9%8d%b5","status":"publish","type":"post","link":"https:\/\/server.hk\/cnblog\/175065\/","title":{"rendered":"\u5982\u4f55\u8a2d\u7f6e\u4e3b\u9375\u5728\u6578\u64da\u5eab\u4e2d\u4fdd\u8b49\u6578\u64da\u5b8c\u6574\u6027 (\u8a2d\u7f6e\u4e3b\u9375 \u6578\u64da\u5eab)"},"content":{"rendered":"<h1 id=\"%e5%a6%82%e4%bd%95%e8%a8%ad%e7%bd%ae%e4%b8%bb%e9%8d%b5%e5%9c%a8%e6%95%b8%e6%93%9a%e5%ba%ab%e4%b8%ad%e4%bf%9d%e8%ad%89%e6%95%b8%e6%93%9a%e5%ae%8c%e6%95%b4%e6%80%a7-VoCiBuEzHi\">\u5982\u4f55\u8a2d\u7f6e\u4e3b\u9375\u5728\u6578\u64da\u5eab\u4e2d\u4fdd\u8b49\u6578\u64da\u5b8c\u6574\u6027<\/h1>\n<p>\u5728\u6578\u64da\u5eab\u8a2d\u8a08\u4e2d\uff0c\u4e3b\u9375\uff08Primary Key\uff09\u662f\u4e00\u500b\u81f3\u95dc\u91cd\u8981\u7684\u6982\u5ff5\u3002\u5b83\u4e0d\u50c5\u7528\u65bc\u552f\u4e00\u6a19\u8b58\u6578\u64da\u8868\u4e2d\u7684\u6bcf\u4e00\u884c\u8a18\u9304\uff0c\u9084\u5728\u4fdd\u8b49\u6578\u64da\u5b8c\u6574\u6027\u65b9\u9762\u767c\u63ee\u8457\u91cd\u8981\u4f5c\u7528\u3002\u672c\u6587\u5c07\u63a2\u8a0e\u5982\u4f55\u8a2d\u7f6e\u4e3b\u9375\u4ee5\u78ba\u4fdd\u6578\u64da\u5b8c\u6574\u6027\uff0c\u4e26\u63d0\u4f9b\u4e00\u4e9b\u5be6\u7528\u7684\u793a\u4f8b\u548c\u4ee3\u78bc\u7247\u6bb5\u3002<\/p>\n<h2 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\u8a2d\u8a08\u6578\u64da\u8868<\/h3>\n<p>\u5728\u8a2d\u8a08\u6578\u64da\u8868\u6642\uff0c\u9996\u5148\u9700\u8981\u78ba\u5b9a\u54ea\u4e9b\u5217\u5c07\u4f5c\u70ba\u4e3b\u9375\u3002\u9019\u4e9b\u5217\u61c9\u8a72\u80fd\u5920\u552f\u4e00\u6a19\u8b58\u6bcf\u4e00\u689d\u8a18\u9304\u3002\u4f8b\u5982\uff0c\u5728\u4e00\u500b\u7528\u6236\u4fe1\u606f\u8868\u4e2d\uff0c\u901a\u5e38\u6703\u9078\u64c7\u7528\u6236ID\u4f5c\u70ba\u4e3b\u9375\u3002<\/p>\n<h3 id=\"2-%e4%bd%bf%e7%94%a8sql%e8%aa%9e%e5%8f%a5%e5%89%b5%e5%bb%ba%e4%b8%bb%e9%8d%b5-VoCiBuEzHi\">2. \u4f7f\u7528SQL\u8a9e\u53e5\u5275\u5efa\u4e3b\u9375<\/h3>\n<p>\u5728\u5275\u5efa\u6578\u64da\u8868\u6642\uff0c\u53ef\u4ee5\u4f7f\u7528SQL\u8a9e\u53e5\u4f86\u8a2d\u7f6e\u4e3b\u9375\u3002\u4ee5\u4e0b\u662f\u4e00\u500b\u793a\u4f8b\uff1a<\/p>\n<pre><code>CREATE TABLE Users (\n    UserID INT NOT NULL,\n    UserName VARCHAR(100),\n    Email VARCHAR(100),\n    PRIMARY KEY (UserID)\n);<\/code><\/pre>\n<p>\u5728\u9019\u500b\u4f8b\u5b50\u4e2d\uff0cUserID\u88ab\u8a2d\u7f6e\u70ba\u4e3b\u9375\uff0c\u9019\u610f\u5473\u8457\u6bcf\u500b\u7528\u6236\u7684ID\u5fc5\u9808\u662f\u552f\u4e00\u7684\u3002<\/p>\n<h3 id=\"3-%e5%9c%a8%e5%b7%b2%e5%ad%98%e5%9c%a8%e7%9a%84%e8%a1%a8%e4%b8%ad%e6%b7%bb%e5%8a%a0%e4%b8%bb%e9%8d%b5-VoCiBuEzHi\">3. \u5728\u5df2\u5b58\u5728\u7684\u8868\u4e2d\u6dfb\u52a0\u4e3b\u9375<\/h3>\n<p>\u5982\u679c\u6578\u64da\u8868\u5df2\u7d93\u5b58\u5728\uff0c\u4f46\u5c1a\u672a\u8a2d\u7f6e\u4e3b\u9375\uff0c\u53ef\u4ee5\u4f7f\u7528ALTER TABLE\u8a9e\u53e5\u4f86\u6dfb\u52a0\u4e3b\u9375\u3002\u4f8b\u5982\uff1a<\/p>\n<pre><code>ALTER TABLE Users\nADD PRIMARY KEY (UserID);<\/code><\/pre>\n<h3 id=\"4-%e8%99%95%e7%90%86%e8%a4%87%e5%90%88%e4%b8%bb%e9%8d%b5-VoCiBuEzHi\">4. \u8655\u7406\u8907\u5408\u4e3b\u9375<\/h3>\n<p>\u5982\u679c\u9700\u8981\u8a2d\u7f6e\u8907\u5408\u4e3b\u9375\uff0c\u53ef\u4ee5\u5728\u5275\u5efa\u8868\u6642\u6307\u5b9a\u591a\u500b\u5217\u3002\u4f8b\u5982\uff1a<\/p>\n<pre><code>CREATE TABLE Orders (\n    OrderID INT NOT NULL,\n    ProductID INT NOT NULL,\n    UserID INT NOT NULL,\n    PRIMARY KEY (OrderID, ProductID)\n);<\/code><\/pre>\n<p>\u5728\u9019\u500b\u4f8b\u5b50\u4e2d\uff0cOrderID\u548cProductID\u7684\u7d44\u5408\u5c07\u552f\u4e00\u6a19\u8b58\u6bcf\u4e00\u689d\u8a02\u55ae\u8a18\u9304\u3002<\/p>\n<h2 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href=\"https:\/\/server.hk\">\u9999\u6e2fVPS<\/a>\u4f86\u652f\u6301\u60a8\u7684\u61c9\u7528\u7a0b\u5e8f\u548c\u6578\u64da\u5b58\u5132\u9700\u6c42\u3002\u7121\u8ad6\u662f\u6578\u64da\u5eab\u7ba1\u7406\u9084\u662f\u5176\u4ed6\u670d\u52d9\uff0c\u6211\u5011\u90fd\u80fd\u63d0\u4f9b\u7a69\u5b9a\u7684\u652f\u6301\u3002<\/p>\n","protected":false},"excerpt":{"rendered":"<p>\u5b78\u7fd2\u5982\u4f55\u5728\u6578\u64da\u5eab\u4e2d\u8a2d\u7f6e\u4e3b\u9375\uff0c\u4ee5\u78ba\u4fdd\u6578\u64da\u5b8c\u6574\u6027\uff0c\u9632\u6b62\u91cd\u8907\u548c\u4e0d\u4e00\u81f4\u7684\u6578\u64da\u689d\u76ee\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-175065","post","type-post","status-publish","format-standard","hentry","category-database"],"_links":{"self":[{"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/posts\/175065","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=175065"}],"version-history":[{"count":1,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/posts\/175065\/revisions"}],"predecessor-version":[{"id":175066,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/posts\/175065\/revisions\/175066"}],"wp:attachment":[{"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/media?parent=175065"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/categories?post=175065"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/tags?post=175065"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}