{"id":60787,"date":"2024-10-13T05:48:16","date_gmt":"2024-10-12T21:48:16","guid":{"rendered":"https:\/\/server.hk\/cnblog\/60787\/"},"modified":"2024-10-13T05:48:16","modified_gmt":"2024-10-12T21:48:16","slug":"db2%e6%95%b8%e6%93%9a%e5%ba%ab%e8%a8%ad%e8%a8%88%e7%9a%84%e4%b8%89%e5%80%8b%e5%bb%ba%e8%ad%b0","status":"publish","type":"post","link":"https:\/\/server.hk\/cnblog\/60787\/","title":{"rendered":"DB2\u6578\u64da\u5eab\u8a2d\u8a08\u7684\u4e09\u500b\u5efa\u8b70"},"content":{"rendered":"<h1 id=\"db2%e6%95%b8%e6%93%9a%e5%ba%ab%e8%a8%ad%e8%a8%88%e7%9a%84%e4%b8%89%e5%80%8b%e5%bb%ba%e8%ad%b0-eAKEPCBirV\">DB2\u6578\u64da\u5eab\u8a2d\u8a08\u7684\u4e09\u500b\u5efa\u8b70<\/h1>\n<p>\u5728\u7576\u4eca\u6578\u64da\u9a45\u52d5\u7684\u4e16\u754c\u4e2d\uff0c\u6578\u64da\u5eab\u8a2d\u8a08\u7684\u8cea\u91cf\u76f4\u63a5\u5f71\u97ff\u5230\u61c9\u7528\u7a0b\u5e8f\u7684\u6027\u80fd\u548c\u53ef\u64f4\u5c55\u6027\u3002IBM\u7684DB2\u6578\u64da\u5eab\u662f\u4e00\u500b\u5f37\u5927\u7684\u95dc\u4fc2\u6578\u64da\u5eab\u7ba1\u7406\u7cfb\u7d71\uff0c\u5ee3\u6cdb\u61c9\u7528\u65bc\u4f01\u696d\u7d1a\u61c9\u7528\u4e2d\u3002\u672c\u6587\u5c07\u63a2\u8a0e\u4e09\u500b\u95dc\u9375\u5efa\u8b70\uff0c\u4ee5\u5e6b\u52a9\u958b\u767c\u8005\u548c\u6578\u64da\u5eab\u7ba1\u7406\u54e1\u5728DB2\u4e2d\u9032\u884c\u6709\u6548\u7684\u6578\u64da\u5eab\u8a2d\u8a08\u3002<\/p>\n<h2 id=\"1-%e6%ad%a3%e7%a2%ba%e7%9a%84%e6%95%b8%e6%93%9a%e5%bb%ba%e6%a8%a1-eAKEPCBirV\">1. 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TABLE User (\n    UserID INT PRIMARY KEY,\n    UserName VARCHAR(100),\n    Email VARCHAR(100),\n    RegistrationDate DATE\n);\n\nCREATE TABLE Product (\n    ProductID INT PRIMARY KEY,\n    ProductName VARCHAR(100),\n    Price DECIMAL(10, 2)\n);\n\nCREATE TABLE Order (\n    OrderID INT PRIMARY KEY,\n    UserID INT,\n    OrderDate DATE,\n    FOREIGN KEY (UserID) REFERENCES User(UserID)\n);<\/code><\/pre>\n<h2 id=\"2-%e5%84%aa%e5%8c%96%e7%b4%a2%e5%bc%95%e8%a8%ad%e8%a8%88-eAKEPCBirV\">2. 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INDEX idx_user_email ON User(Email);<\/code><\/pre>\n<h2 id=\"3-%e5%af%a6%e6%96%bd%e6%95%b8%e6%93%9a%e5%ae%8c%e6%95%b4%e6%80%a7%e7%b4%84%e6%9d%9f-eAKEPCBirV\">3. \u5be6\u65bd\u6578\u64da\u5b8c\u6574\u6027\u7d04\u675f<\/h2>\n<p>\u6578\u64da\u5b8c\u6574\u6027\u662f\u78ba\u4fdd\u6578\u64da\u6e96\u78ba\u6027\u548c\u4e00\u81f4\u6027\u7684\u95dc\u9375\u3002\u5728DB2\u4e2d\uff0c\u53ef\u4ee5\u901a\u904e\u8a2d\u7f6e\u7d04\u675f\u4f86\u5be6\u65bd\u6578\u64da\u5b8c\u6574\u6027\u3002\u5e38\u898b\u7684\u7d04\u675f\u5305\u62ec\uff1a<\/p>\n<ul>\n<li><strong>\u4e3b\u9375\u7d04\u675f\uff1a<\/strong>\u78ba\u4fdd\u6bcf\u689d\u8a18\u9304\u7684\u552f\u4e00\u6027\u3002<\/li>\n<li><strong>\u5916\u9375\u7d04\u675f\uff1a<\/strong>\u78ba\u4fdd\u6578\u64da\u4e4b\u9593\u7684\u53c3\u8003\u5b8c\u6574\u6027\u3002<\/li>\n<li><strong>\u6aa2\u67e5\u7d04\u675f\uff1a<\/strong>\u78ba\u4fdd\u6578\u64da\u7b26\u5408\u7279\u5b9a\u689d\u4ef6\uff0c\u4f8b\u5982\u50f9\u683c\u5fc5\u9808\u5927\u65bc\u96f6\u3002<\/li>\n<\/ul>\n<p>\u4f8b\u5982\uff0c\u5728Product\u8868\u4e2d\uff0c\u53ef\u4ee5\u6dfb\u52a0\u6aa2\u67e5\u7d04\u675f\u4f86\u78ba\u4fdd\u50f9\u683c\u70ba\u6b63\uff1a<\/p>\n<pre><code>ALTER TABLE Product\nADD CONSTRAINT chk_price CHECK (Price &gt; 0);<\/code><\/pre>\n<h2 id=\"%e7%b8%bd%e7%b5%90-eAKEPCBirV\">\u7e3d\u7d50<\/h2>\n<p>\u5728DB2\u6578\u64da\u5eab\u8a2d\u8a08\u4e2d\uff0c\u6b63\u78ba\u7684\u6578\u64da\u5efa\u6a21\u3001\u512a\u5316\u7d22\u5f15\u8a2d\u8a08\u548c\u5be6\u65bd\u6578\u64da\u5b8c\u6574\u6027\u7d04\u675f\u662f\u78ba\u4fdd\u7cfb\u7d71\u6027\u80fd\u548c\u6578\u64da\u6e96\u78ba\u6027\u7684\u4e09\u500b\u95dc\u9375\u5efa\u8b70\u3002\u9019\u4e9b\u5efa\u8b70\u4e0d\u50c5\u80fd\u63d0\u9ad8\u6578\u64da\u5eab\u7684\u6548\u7387\uff0c\u9084\u80fd\u6e1b\u5c11\u672a\u4f86\u7dad\u8b77\u7684\u6210\u672c\u3002\u82e5\u60a8\u9700\u8981\u9032\u4e00\u6b65\u4e86\u89e3\u5982\u4f55\u5728\u9999\u6e2f\u7684\u74b0\u5883\u4e2d\u90e8\u7f72\u9ad8\u6548\u7684\u6578\u64da\u5eab\u89e3\u6c7a\u65b9\u6848\uff0c\u8acb\u8a2a\u554f\u6211\u5011\u7684<a href=\"https:\/\/server.hk\">VPS<\/a>\u670d\u52d9\uff0c\u7372\u53d6\u66f4\u591a\u8cc7\u8a0a\u3002<\/p>\n","protected":false},"excerpt":{"rendered":"<p>\u63a2\u7d22DB2\u6578\u64da\u5eab\u8a2d\u8a08\u7684\u4e09\u500b\u95dc\u9375\u5efa\u8b70\uff0c\u63d0\u5347\u6027\u80fd\u3001\u53ef\u64f4\u5c55\u6027\u8207\u6578\u64da\u5b8c\u6574\u6027\uff0c\u52a9\u60a8\u6253\u9020\u9ad8\u6548\u7684\u6578\u64da\u89e3\u6c7a\u65b9\u6848\u3002<\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"closed","ping_status":"","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[101],"tags":[],"class_list":["post-60787","post","type-post","status-publish","format-standard","hentry","category-database"],"_links":{"self":[{"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/posts\/60787","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"}],"author":[{"embeddable":true,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/comments?post=60787"}],"version-history":[{"count":1,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/posts\/60787\/revisions"}],"predecessor-version":[{"id":60788,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/posts\/60787\/revisions\/60788"}],"wp:attachment":[{"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/media?parent=60787"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/categories?post=60787"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/tags?post=60787"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}