{"id":143851,"date":"2024-11-01T01:47:35","date_gmt":"2024-10-31T17:47:35","guid":{"rendered":"https:\/\/server.hk\/cnblog\/143851\/"},"modified":"2024-11-01T01:47:35","modified_gmt":"2024-10-31T17:47:35","slug":"sql-%e8%81%9a%e7%b0%87%e7%b4%a2%e5%bc%95%e8%88%87%e9%9d%9e%e8%81%9a%e7%b0%87%e7%b4%a2%e5%bc%95%e7%9a%84%e6%9c%ac%e8%b3%aa%e5%8d%80%e5%88%a5","status":"publish","type":"post","link":"https:\/\/server.hk\/cnblog\/143851\/","title":{"rendered":"SQL \u805a\u7c07\u7d22\u5f15\u8207\u975e\u805a\u7c07\u7d22\u5f15\u7684\u672c\u8cea\u5340\u5225"},"content":{"rendered":"<h1 id=\"sql-%e8%81%9a%e7%b0%87%e7%b4%a2%e5%bc%95%e8%88%87%e9%9d%9e%e8%81%9a%e7%b0%87%e7%b4%a2%e5%bc%95%e7%9a%84%e6%9c%ac%e8%b3%aa%e5%8d%80%e5%88%a5-jhuDyXOZAB\">SQL \u805a\u7c07\u7d22\u5f15\u8207\u975e\u805a\u7c07\u7d22\u5f15\u7684\u672c\u8cea\u5340\u5225<\/h1>\n<p>\u5728\u8cc7\u6599\u5eab\u7ba1\u7406\u7cfb\u7d71\u4e2d\uff0c\u7d22\u5f15\u662f\u4e00\u7a2e\u91cd\u8981\u7684\u6578\u64da\u7d50\u69cb\uff0c\u7528\u65bc\u63d0\u9ad8\u67e5\u8a62\u6548\u7387\u3002SQL \u4e2d\u7684\u805a\u7c07\u7d22\u5f15\uff08Clustered Index\uff09\u548c\u975e\u805a\u7c07\u7d22\u5f15\uff08Non-Clustered Index\uff09\u662f\u5169\u7a2e\u4e3b\u8981\u7684\u7d22\u5f15\u985e\u578b\u3002\u96d6\u7136\u5b83\u5011\u7684\u76ee\u7684\u90fd\u662f\u70ba\u4e86\u52a0\u901f\u6578\u64da\u6aa2\u7d22\uff0c\u4f46\u5b83\u5011\u5728\u7d50\u69cb\u548c\u904b\u4f5c\u65b9\u5f0f\u4e0a\u6709\u8457\u672c\u8cea\u7684\u5340\u5225\u3002<\/p>\n<h2 id=\"%e8%81%9a%e7%b0%87%e7%b4%a2%e5%bc%95%e7%9a%84%e7%89%b9%e9%bb%9e-jhuDyXOZAB\">\u805a\u7c07\u7d22\u5f15\u7684\u7279\u9ede<\/h2>\n<p>\u805a\u7c07\u7d22\u5f15\u662f\u5c07\u6578\u64da\u884c\u7684\u7269\u7406\u9806\u5e8f\u8207\u7d22\u5f15\u7684\u908f\u8f2f\u9806\u5e8f\u76f8\u7d50\u5408\u7684\u4e00\u7a2e\u7d22\u5f15\u3002\u9019\u610f\u5473\u8457\uff0c\u6578\u64da\u8868\u4e2d\u7684\u884c\u662f\u6309\u7167\u805a\u7c07\u7d22\u5f15\u7684\u9806\u5e8f\u5b58\u5132\u7684\u3002\u6bcf\u500b\u8868\u53ea\u80fd\u6709\u4e00\u500b\u805a\u7c07\u7d22\u5f15\uff0c\u56e0\u70ba\u6578\u64da\u884c\u53ea\u80fd\u4ee5\u4e00\u7a2e\u65b9\u5f0f\u6392\u5e8f\u3002<\/p>\n<ul>\n<li><strong>\u7269\u7406\u6392\u5e8f\uff1a<\/strong>\u805a\u7c07\u7d22\u5f15\u6703\u6539\u8b8a\u6578\u64da\u7684\u7269\u7406\u5b58\u5132\u9806\u5e8f\uff0c\u9019\u4f7f\u5f97\u7bc4\u570d\u67e5\u8a62\uff08\u5982 BETWEEN \u548c ORDER BY\uff09\u975e\u5e38\u9ad8\u6548\u3002<\/li>\n<li><strong>\u4e3b\u9375\u7d22\u5f15\uff1a<\/strong>\u901a\u5e38\uff0c\u805a\u7c07\u7d22\u5f15\u662f\u57fa\u65bc\u4e3b\u9375\u5275\u5efa\u7684\uff0c\u9019\u6a23\u53ef\u4ee5\u78ba\u4fdd\u6bcf\u4e00\u884c\u7684\u552f\u4e00\u6027\u3002<\/li>\n<li><strong>\u6027\u80fd\u512a\u52e2\uff1a<\/strong>\u5c0d\u65bc\u5927\u91cf\u7684\u8b80\u53d6\u64cd\u4f5c\uff0c\u805a\u7c07\u7d22\u5f15\u80fd\u5920\u986f\u8457\u63d0\u9ad8\u67e5\u8a62\u6027\u80fd\uff0c\u56e0\u70ba\u6578\u64da\u884c\u7684\u5b58\u53d6\u662f\u9023\u7e8c\u7684\u3002<\/li>\n<\/ul>\n<h3 id=\"%e8%81%9a%e7%b0%87%e7%b4%a2%e5%bc%95%e7%9a%84%e7%a4%ba%e4%be%8b-jhuDyXOZAB\">\u805a\u7c07\u7d22\u5f15\u7684\u793a\u4f8b<\/h3>\n<pre><code>CREATE TABLE Employees (\n    EmployeeID INT PRIMARY KEY,\n    LastName VARCHAR(255),\n    FirstName VARCHAR(255)\n);\n\nCREATE CLUSTERED INDEX idx_LastName ON Employees(LastName);\n<\/code><\/pre>\n<h2 id=\"%e9%9d%9e%e8%81%9a%e7%b0%87%e7%b4%a2%e5%bc%95%e7%9a%84%e7%89%b9%e9%bb%9e-jhuDyXOZAB\">\u975e\u805a\u7c07\u7d22\u5f15\u7684\u7279\u9ede<\/h2>\n<p>\u975e\u805a\u7c07\u7d22\u5f15\u5247\u4e0d\u6539\u8b8a\u6578\u64da\u7684\u7269\u7406\u5b58\u5132\u9806\u5e8f\u3002\u5b83\u5011\u662f\u7368\u7acb\u65bc\u6578\u64da\u884c\u7684\u7d50\u69cb\uff0c\u5305\u542b\u4e86\u7d22\u5f15\u9375\u548c\u6307\u5411\u6578\u64da\u884c\u7684\u6307\u91dd\u3002\u6bcf\u500b\u8868\u53ef\u4ee5\u6709\u591a\u500b\u975e\u805a\u7c07\u7d22\u5f15\uff0c\u9019\u4f7f\u5f97\u5b83\u5011\u5728\u67e5\u8a62\u591a\u500b\u5217\u6642\u975e\u5e38\u9748\u6d3b\u3002<\/p>\n<ul>\n<li><strong>\u7368\u7acb\u7d50\u69cb\uff1a<\/strong>\u975e\u805a\u7c07\u7d22\u5f15\u7684\u7d50\u69cb\u8207\u6578\u64da\u8868\u662f\u5206\u958b\u7684\uff0c\u9019\u610f\u5473\u8457\u5b83\u5011\u53ef\u4ee5\u5728\u4e0d\u5f71\u97ff\u6578\u64da\u884c\u5b58\u5132\u9806\u5e8f\u7684\u60c5\u6cc1\u4e0b\u9032\u884c\u5275\u5efa\u3002<\/li>\n<li><strong>\u591a\u91cd\u7d22\u5f15\uff1a<\/strong>\u4e00\u500b\u8868\u53ef\u4ee5\u64c1\u6709\u591a\u500b\u975e\u805a\u7c07\u7d22\u5f15\uff0c\u9019\u4f7f\u5f97\u67e5\u8a62\u591a\u500b\u689d\u4ef6\u6642\u66f4\u52a0\u9ad8\u6548\u3002<\/li>\n<li><strong>\u67e5\u8a62\u6027\u80fd\uff1a<\/strong>\u96d6\u7136\u975e\u805a\u7c07\u7d22\u5f15\u7684\u67e5\u8a62\u6027\u80fd\u4e0d\u5982\u805a\u7c07\u7d22\u5f15\uff0c\u4f46\u5728\u67d0\u4e9b\u60c5\u6cc1\u4e0b\uff0c\u7279\u5225\u662f\u7576\u67e5\u8a62\u6d89\u53ca\u591a\u500b\u5217\u6642\uff0c\u975e\u805a\u7c07\u7d22\u5f15\u4ecd\u7136\u80fd\u5920\u63d0\u4f9b\u826f\u597d\u7684\u6027\u80fd\u3002<\/li>\n<\/ul>\n<h3 id=\"%e9%9d%9e%e8%81%9a%e7%b0%87%e7%b4%a2%e5%bc%95%e7%9a%84%e7%a4%ba%e4%be%8b-jhuDyXOZAB\">\u975e\u805a\u7c07\u7d22\u5f15\u7684\u793a\u4f8b<\/h3>\n<pre><code>CREATE NONCLUSTERED INDEX idx_FirstName ON Employees(FirstName);\n<\/code><\/pre>\n<h2 id=\"%e8%81%9a%e7%b0%87%e7%b4%a2%e5%bc%95%e8%88%87%e9%9d%9e%e8%81%9a%e7%b0%87%e7%b4%a2%e5%bc%95%e7%9a%84%e6%af%94%e8%bc%83-jhuDyXOZAB\">\u805a\u7c07\u7d22\u5f15\u8207\u975e\u805a\u7c07\u7d22\u5f15\u7684\u6bd4\u8f03<\/h2>\n<table>\n<thead>\n<tr>\n<th>\u7279\u6027<\/th>\n<th>\u805a\u7c07\u7d22\u5f15<\/th>\n<th>\u975e\u805a\u7c07\u7d22\u5f15<\/th>\n<\/tr>\n<\/thead>\n<tbody>\n<tr>\n<td>\u6578\u91cf<\/td>\n<td>\u6bcf\u500b\u8868\u53ea\u80fd\u6709\u4e00\u500b<\/td>\n<td>\u6bcf\u500b\u8868\u53ef\u4ee5\u6709\u591a\u500b<\/td>\n<\/tr>\n<tr>\n<td>\u6578\u64da\u5b58\u5132<\/td>\n<td>\u6539\u8b8a\u6578\u64da\u7684\u7269\u7406\u9806\u5e8f<\/td>\n<td>\u4e0d\u6539\u8b8a\u6578\u64da\u7684\u7269\u7406\u9806\u5e8f<\/td>\n<\/tr>\n<tr>\n<td>\u67e5\u8a62\u6027\u80fd<\/td>\n<td>\u5c0d\u7bc4\u570d\u67e5\u8a62\u512a\u5316<\/td>\n<td>\u5c0d\u591a\u5217\u67e5\u8a62\u512a\u5316<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n<h2 id=\"%e7%b8%bd%e7%b5%90-jhuDyXOZAB\">\u7e3d\u7d50<\/h2>\n<p>\u805a\u7c07\u7d22\u5f15\u548c\u975e\u805a\u7c07\u7d22\u5f15\u5728 SQL \u4e2d\u626e\u6f14\u8457\u91cd\u8981\u7684\u89d2\u8272\uff0c\u7406\u89e3\u5b83\u5011\u7684\u672c\u8cea\u5340\u5225\u5c0d\u65bc\u6578\u64da\u5eab\u8a2d\u8a08\u548c\u6027\u80fd\u512a\u5316\u81f3\u95dc\u91cd\u8981\u3002\u9078\u64c7\u5408\u9069\u7684\u7d22\u5f15\u985e\u578b\u53ef\u4ee5\u986f\u8457\u63d0\u9ad8\u67e5\u8a62\u6548\u7387\uff0c\u5f9e\u800c\u63d0\u5347\u6574\u9ad4\u7cfb\u7d71\u7684\u6027\u80fd\u3002\u5982\u679c\u60a8\u6b63\u5728\u5c0b\u627e\u9ad8\u6548\u7684 <a href=\"https:\/\/server.hk\">VPS<\/a> \u89e3\u6c7a\u65b9\u6848\uff0cServer.HK \u63d0\u4f9b\u591a\u7a2e\u9078\u64c7\uff0c\u6eff\u8db3\u4e0d\u540c\u9700\u6c42\u7684\u5ba2\u6236\u3002\u7121\u8ad6\u662f <a href=\"https:\/\/server.hk\">\u9999\u6e2f\u4f3a\u670d\u5668<\/a> \u9084\u662f <a href=\"https:\/\/server.hk\">\u4e91\u4f3a\u670d\u5668<\/a>\uff0c\u6211\u5011\u90fd\u80fd\u70ba\u60a8\u63d0\u4f9b\u7a69\u5b9a\u53ef\u9760\u7684\u670d\u52d9\u3002<\/p>\n","protected":false},"excerpt":{"rendered":"<p>\u63a2\u7d22 SQL \u805a\u7c07\u7d22\u5f15\u8207\u975e\u805a\u7c07\u7d22\u5f15\u7684\u672c\u8cea\u5340\u5225\uff0c\u4e86\u89e3\u5b83\u5011\u5728\u6578\u64da\u5b58\u5132\u548c\u67e5\u8a62\u6027\u80fd\u4e0a\u7684\u5f71\u97ff\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-143851","post","type-post","status-publish","format-standard","hentry","category-database"],"_links":{"self":[{"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/posts\/143851","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=143851"}],"version-history":[{"count":1,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/posts\/143851\/revisions"}],"predecessor-version":[{"id":143852,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/posts\/143851\/revisions\/143852"}],"wp:attachment":[{"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/media?parent=143851"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/categories?post=143851"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/tags?post=143851"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}