{"id":154665,"date":"2024-11-02T17:42:21","date_gmt":"2024-11-02T09:42:21","guid":{"rendered":"https:\/\/server.hk\/cnblog\/154665\/"},"modified":"2024-11-02T17:42:22","modified_gmt":"2024-11-02T09:42:22","slug":"%e5%a4%9a%e8%a1%a8%e5%a4%9a%e6%9f%a5%e8%a9%a2%e6%a2%9d%e4%bb%b6%e5%b0%8d-sql-server-%e6%9f%a5%e8%a9%a2%e6%80%a7%e8%83%bd%e7%9a%84%e5%84%aa%e5%8c%96","status":"publish","type":"post","link":"https:\/\/server.hk\/cnblog\/154665\/","title":{"rendered":"\u591a\u8868\u591a\u67e5\u8a62\u689d\u4ef6\u5c0d SQL Server \u67e5\u8a62\u6027\u80fd\u7684\u512a\u5316"},"content":{"rendered":"<h1 id=\"%e5%a4%9a%e8%a1%a8%e5%a4%9a%e6%9f%a5%e8%a9%a2%e6%a2%9d%e4%bb%b6%e5%b0%8d-sql-server-%e6%9f%a5%e8%a9%a2%e6%80%a7%e8%83%bd%e7%9a%84%e5%84%aa%e5%8c%96-lubslMITiF\">\u591a\u8868\u591a\u67e5\u8a62\u689d\u4ef6\u5c0d SQL Server \u67e5\u8a62\u6027\u80fd\u7684\u512a\u5316<\/h1>\n<p>\u5728\u73fe\u4eca\u7684\u6578\u64da\u9a45\u52d5\u6642\u4ee3\uff0cSQL Server \u4f5c\u70ba\u4e00\u500b\u5f37\u5927\u7684\u95dc\u4fc2\u578b\u6578\u64da\u5eab\u7ba1\u7406\u7cfb\u7d71\uff0c\u5ee3\u6cdb\u61c9\u7528\u65bc\u5404\u7a2e\u696d\u52d9\u5834\u666f\u4e2d\u3002\u96a8\u8457\u6578\u64da\u91cf\u7684\u589e\u9577\uff0c\u5982\u4f55\u512a\u5316\u67e5\u8a62\u6027\u80fd\u6210\u70ba\u4e86\u958b\u767c\u8005\u548c\u6578\u64da\u5eab\u7ba1\u7406\u54e1\u9762\u81e8\u7684\u4e00\u5927\u6311\u6230\u3002\u7279\u5225\u662f\u5728\u6d89\u53ca\u591a\u8868\u67e5\u8a62\u548c\u591a\u689d\u4ef6\u904e\u6ffe\u7684\u60c5\u6cc1\u4e0b\uff0c\u67e5\u8a62\u6027\u80fd\u7684\u512a\u5316\u986f\u5f97\u5c24\u70ba\u91cd\u8981\u3002<\/p>\n<h2 id=\"%e7%90%86%e8%a7%a3%e5%a4%9a%e8%a1%a8%e6%9f%a5%e8%a9%a2%e7%9a%84%e5%9f%ba%e6%9c%ac%e6%a6%82%e5%bf%b5-lubslMITiF\">\u7406\u89e3\u591a\u8868\u67e5\u8a62\u7684\u57fa\u672c\u6982\u5ff5<\/h2>\n<p>\u591a\u8868\u67e5\u8a62\u901a\u5e38\u662f\u6307\u5728\u4e00\u500b SQL \u67e5\u8a62\u4e2d\u540c\u6642\u5f9e\u591a\u500b\u8868\u4e2d\u6aa2\u7d22\u6578\u64da\u3002\u9019\u7a2e\u67e5\u8a62\u901a\u5e38\u4f7f\u7528 JOIN \u64cd\u4f5c\u4f86\u9023\u63a5\u4e0d\u540c\u7684\u8868\u3002\u6839\u64da\u4e0d\u540c\u7684\u9700\u6c42\uff0c\u958b\u767c\u8005\u53ef\u4ee5\u9078\u64c7 INNER JOIN\u3001LEFT JOIN\u3001RIGHT JOIN \u7b49\u4e0d\u540c\u7684\u9023\u63a5\u65b9\u5f0f\u3002<\/p>\n<h3 id=\"join-%e7%9a%84%e9%a1%9e%e5%9e%8b-lubslMITiF\">JOIN \u7684\u985e\u578b<\/h3>\n<ul>\n<li><strong>INNER JOIN<\/strong>: \u53ea\u8fd4\u56de\u5169\u500b\u8868\u4e2d\u5339\u914d\u7684\u884c\u3002<\/li>\n<li><strong>LEFT JOIN<\/strong>: \u8fd4\u56de\u5de6\u8868\u7684\u6240\u6709\u884c\uff0c\u5373\u4f7f\u53f3\u8868\u4e2d\u6c92\u6709\u5339\u914d\u7684\u884c\u3002<\/li>\n<li><strong>RIGHT JOIN<\/strong>: \u8fd4\u56de\u53f3\u8868\u7684\u6240\u6709\u884c\uff0c\u5373\u4f7f\u5de6\u8868\u4e2d\u6c92\u6709\u5339\u914d\u7684\u884c\u3002<\/li>\n<li><strong>FULL JOIN<\/strong>: \u8fd4\u56de\u5169\u500b\u8868\u4e2d\u7684\u6240\u6709\u884c\uff0c\u7121\u8ad6\u662f\u5426\u6709\u5339\u914d\u3002<\/li>\n<\/ul>\n<h2 id=\"%e6%9f%a5%e8%a9%a2%e6%80%a7%e8%83%bd%e7%9a%84%e5%bd%b1%e9%9f%bf%e5%9b%a0%e7%b4%a0-lubslMITiF\">\u67e5\u8a62\u6027\u80fd\u7684\u5f71\u97ff\u56e0\u7d20<\/h2>\n<p>\u5728\u9032\u884c\u591a\u8868\u67e5\u8a62\u6642\uff0c\u67e5\u8a62\u6027\u80fd\u53d7\u5230\u591a\u7a2e\u56e0\u7d20\u7684\u5f71\u97ff\uff0c\u5305\u62ec\u4f46\u4e0d\u9650\u65bc\uff1a<\/p>\n<ul>\n<li>\u6578\u64da\u8868\u7684\u5927\u5c0f\u548c\u7d50\u69cb<\/li>\n<li>\u7d22\u5f15\u7684\u4f7f\u7528\u60c5\u6cc1<\/li>\n<li>\u67e5\u8a62\u7684\u8907\u96dc\u6027<\/li>\n<li>\u786c\u9ad4\u8cc7\u6e90\u7684\u914d\u7f6e<\/li>\n<\/ul>\n<h3 id=\"%e7%b4%a2%e5%bc%95%e7%9a%84%e4%bd%9c%e7%94%a8-lubslMITiF\">\u7d22\u5f15\u7684\u4f5c\u7528<\/h3>\n<p>\u7d22\u5f15\u662f\u63d0\u9ad8\u67e5\u8a62\u6027\u80fd\u7684\u95dc\u9375\u3002\u9069\u7576\u7684\u7d22\u5f15\u53ef\u4ee5\u986f\u8457\u6e1b\u5c11\u67e5\u8a62\u6240\u9700\u7684\u6642\u9593\u3002\u5c0d\u65bc\u591a\u8868\u67e5\u8a62\uff0c\u78ba\u4fdd\u5728 JOIN \u689d\u4ef6\u548c WHERE \u689d\u4ef6\u4e2d\u4f7f\u7528\u7684\u5217\u4e0a\u5efa\u7acb\u7d22\u5f15\u662f\u975e\u5e38\u91cd\u8981\u7684\u3002\u4f8b\u5982\uff1a<\/p>\n<pre><code>CREATE INDEX idx_customer_id ON Orders(CustomerID);\nCREATE INDEX idx_order_date ON Orders(OrderDate);\n<\/code><\/pre>\n<p>\u9019\u6a23\u53ef\u4ee5\u52a0\u5feb\u57fa\u65bc CustomerID \u548c OrderDate \u7684\u67e5\u8a62\u901f\u5ea6\u3002<\/p>\n<h2 id=\"%e5%84%aa%e5%8c%96%e6%9f%a5%e8%a9%a2%e7%9a%84%e7%ad%96%e7%95%a5-lubslMITiF\">\u512a\u5316\u67e5\u8a62\u7684\u7b56\u7565<\/h2>\n<p>\u4ee5\u4e0b\u662f\u4e00\u4e9b\u512a\u5316\u591a\u8868\u67e5\u8a62\u6027\u80fd\u7684\u7b56\u7565\uff1a<\/p>\n<h3 id=\"1-%e7%b0%a1%e5%8c%96%e6%9f%a5%e8%a9%a2-lubslMITiF\">1. \u7c21\u5316\u67e5\u8a62<\/h3>\n<p>\u907f\u514d\u4e0d\u5fc5\u8981\u7684\u5217\u548c\u8868\uff0c\u50c5\u9078\u64c7\u9700\u8981\u7684\u6578\u64da\u3002\u4f8b\u5982\uff0c\u4f7f\u7528 SELECT \u53ea\u9078\u64c7\u5fc5\u8981\u7684\u5217\uff0c\u800c\u4e0d\u662f\u4f7f\u7528 SELECT *\u3002<\/p>\n<pre><code>SELECT CustomerName, OrderDate\nFROM Customers\nINNER JOIN Orders ON Customers.CustomerID = Orders.CustomerID\nWHERE OrderDate &gt; '2023-01-01';\n<\/code><\/pre>\n<h3 id=\"2-%e4%bd%bf%e7%94%a8%e9%81%a9%e7%95%b6%e7%9a%84-join-%e9%a1%9e%e5%9e%8b-lubslMITiF\">2. \u4f7f\u7528\u9069\u7576\u7684 JOIN \u985e\u578b<\/h3>\n<p>\u6839\u64da\u696d\u52d9\u9700\u6c42\u9078\u64c7\u5408\u9069\u7684 JOIN \u985e\u578b\uff0c\u907f\u514d\u4f7f\u7528\u4e0d\u5fc5\u8981\u7684 FULL JOIN\uff0c\u56e0\u70ba\u5b83\u53ef\u80fd\u6703\u5c0e\u81f4\u6027\u80fd\u4e0b\u964d\u3002<\/p>\n<h3 id=\"3-%e5%88%86%e6%9e%90%e5%9f%b7%e8%a1%8c%e8%a8%88%e5%8a%83-lubslMITiF\">3. \u5206\u6790\u57f7\u884c\u8a08\u5283<\/h3>\n<p>\u4f7f\u7528 SQL Server Management Studio \u7684\u57f7\u884c\u8a08\u5283\u529f\u80fd\uff0c\u5206\u6790\u67e5\u8a62\u7684\u57f7\u884c\u904e\u7a0b\uff0c\u627e\u51fa\u6027\u80fd\u74f6\u9838\u3002<\/p>\n<h3 id=\"4-%e5%ae%9a%e6%9c%9f%e7%b6%ad%e8%ad%b7%e6%95%b8%e6%93%9a%e5%ba%ab-lubslMITiF\">4. \u5b9a\u671f\u7dad\u8b77\u6578\u64da\u5eab<\/h3>\n<p>\u5b9a\u671f\u91cd\u5efa\u7d22\u5f15\u548c\u66f4\u65b0\u7d71\u8a08\u4fe1\u606f\uff0c\u4ee5\u78ba\u4fdd\u67e5\u8a62\u512a\u5316\u5668\u80fd\u5920\u751f\u6210\u6700\u4f73\u7684\u57f7\u884c\u8a08\u5283\u3002<\/p>\n<h2 id=\"%e7%b5%90%e8%ab%96-lubslMITiF\">\u7d50\u8ad6<\/h2>\n<p>\u591a\u8868\u591a\u67e5\u8a62\u689d\u4ef6\u7684 SQL Server \u67e5\u8a62\u6027\u80fd\u512a\u5316\u662f\u4e00\u500b\u8907\u96dc\u4f46\u91cd\u8981\u7684\u8ab2\u984c\u3002\u901a\u904e\u5408\u7406\u4f7f\u7528\u7d22\u5f15\u3001\u7c21\u5316\u67e5\u8a62\u3001\u9078\u64c7\u5408\u9069\u7684 JOIN \u985e\u578b\u4ee5\u53ca\u5b9a\u671f\u7dad\u8b77\u6578\u64da\u5eab\uff0c\u53ef\u4ee5\u986f\u8457\u63d0\u9ad8\u67e5\u8a62\u6027\u80fd\u3002\u96a8\u8457\u6578\u64da\u91cf\u7684\u589e\u9577\uff0c\u9019\u4e9b\u512a\u5316\u7b56\u7565\u5c07\u5e6b\u52a9\u4f01\u696d\u66f4\u9ad8\u6548\u5730\u5229\u7528\u6578\u64da\uff0c\u63d0\u5347\u696d\u52d9\u904b\u71df\u6548\u7387\u3002<\/p>\n<p>\u5982\u9700\u4e86\u89e3\u66f4\u591a\u6709\u95dc <a href=\"https:\/\/server.hk\">\u9999\u6e2fVPS<\/a> \u548c\u6578\u64da\u5eab\u7ba1\u7406\u7684\u8cc7\u8a0a\uff0c\u8acb\u8a2a\u554f\u6211\u5011\u7684\u7db2\u7ad9\u3002<\/p>\n","protected":false},"excerpt":{"rendered":"<p>\u63a2\u7d22\u591a\u8868\u591a\u67e5\u8a62\u689d\u4ef6\u5982\u4f55\u512a\u5316 SQL Server \u67e5\u8a62\u6027\u80fd\uff0c\u63d0\u9ad8\u6578\u64da\u6aa2\u7d22\u6548\u7387\uff0c\u5be6\u73fe\u66f4\u5feb\u7684\u6578\u64da\u8655\u7406\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-154665","post","type-post","status-publish","format-standard","hentry","category-database"],"_links":{"self":[{"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/posts\/154665","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=154665"}],"version-history":[{"count":1,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/posts\/154665\/revisions"}],"predecessor-version":[{"id":154666,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/posts\/154665\/revisions\/154666"}],"wp:attachment":[{"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/media?parent=154665"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/categories?post=154665"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/tags?post=154665"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}