{"id":126,"date":"2026-07-23T23:40:55","date_gmt":"2026-07-23T15:40:55","guid":{"rendered":"https:\/\/fsdata.site\/?p=126"},"modified":"2026-07-23T23:40:55","modified_gmt":"2026-07-23T15:40:55","slug":"sqlserver-execution-plan-index","status":"publish","type":"post","link":"https:\/\/fsdata.site\/?p=126","title":{"rendered":"SQL Server \u6267\u884c\u8ba1\u5212\u89e3\u8bfb\u4e0e\u7d22\u5f15\u4f18\u5316\u5b9e\u6218"},"content":{"rendered":"<h2>\u4e3a\u4ec0\u4e48\u8981\u61c2\u6267\u884c\u8ba1\u5212<\/h2>\n<p>SQL Server \u6162\u67e5\u8be2\u4f18\u5316\uff0c\u672c\u8d28\u4e0a\u5c31\u662f&#8221;\u8bfb\u61c2\u6267\u884c\u8ba1\u5212 + \u8ba9\u4f18\u5316\u5668\u9009\u5bf9\u7d22\u5f15&#8221;\u3002\u5f88\u591a\u5f00\u53d1\u8005\u53ea\u4f1a\u52a0\u7d22\u5f15\uff0c\u4f46\u52a0\u5b8c\u8fd8\u662f\u6162\uff0c\u56e0\u4e3a\u6ca1\u770b\u6267\u884c\u8ba1\u5212\u5230\u5e95\u8d70\u4e86\u6ca1\u8d70\u3002\u672c\u6587\u7528\u5b9e\u64cd\u5e26\u4f60\u628a\u6267\u884c\u8ba1\u5212\u8bfb\u660e\u767d\u3002<\/p>\n<h2>\u4e00\u3001\u600e\u4e48\u770b\u6267\u884c\u8ba1\u5212<\/h2>\n<p>\u5728 SSMS \u91cc\u4e24\u79cd\u5e38\u7528\u65b9\u5f0f\uff1a<\/p>\n<ul>\n<li><strong>\u56fe\u5f62\u5316<\/strong>\uff1a\u70b9&#8221;\u663e\u793a\u4f30\u8ba1\u7684\u6267\u884c\u8ba1\u5212&#8221;\u6216&#8221;\u5305\u62ec\u5b9e\u9645\u7684\u6267\u884c\u8ba1\u5212&#8221;\uff0c\u6267\u884c\u540e\u770b\u62d3\u6251\u56fe\u3002<\/li>\n<li><strong>\u6587\u672c\u5316<\/strong>\uff1a\u547d\u4ee4\u884c\u66f4\u65b9\u4fbf\u5206\u6790\u5927\u6570\u636e\u91cf\u3002<\/li>\n<\/ul>\n<pre><code>SET STATISTICS IO ON;\nSET STATISTICS TIME ON;\nSELECT * FROM Orders WHERE CustomerId = 10086;\n<\/code><\/pre>\n<p>\u5173\u6ce8\u8f93\u51fa\u91cc\u7684 <code>\u903b\u8f91\u8bfb\u53d6<\/code> \u6b21\u6570\uff0c\u8fd9\u662f\u8861\u91cf\u662f\u5426\u8d70\u7d22\u5f15\u6700\u76f4\u63a5\u7684\u6307\u6807\u2014\u2014\u6570\u5b57\u8d8a\u5c0f\u8d8a\u597d\u3002<\/p>\n<h2>\u4e8c\u3001\u5173\u952e\u64cd\u4f5c\u7b26\u8bc6\u522b<\/h2>\n<table border=\"1\" cellpadding=\"6\">\n<tr>\n<th>\u64cd\u4f5c\u7b26<\/th>\n<th>\u542b\u4e49<\/th>\n<th>\u662f\u5426\u8be5\u8b66\u60d5<\/th>\n<\/tr>\n<tr>\n<td>Table Scan<\/td>\n<td>\u5168\u8868\u626b\u63cf<\/td>\n<td>\u5927\u8868\u51fa\u73b0\u57fa\u672c\u90fd\u8981\u4f18\u5316<\/td>\n<\/tr>\n<tr>\n<td>Index Seek<\/td>\n<td>\u7d22\u5f15\u67e5\u627e<\/td>\n<td>\u7406\u60f3\u72b6\u6001<\/td>\n<\/tr>\n<tr>\n<td>Key Lookup \/ RID Lookup<\/td>\n<td>\u4e66\u7b7e\u67e5\u627e\uff08\u56de\u8868\uff09<\/td>\n<td>\u9891\u7e41\u51fa\u73b0\u8bf4\u660e\u7f3a\u8986\u76d6\u7d22\u5f15<\/td>\n<\/tr>\n<tr>\n<td>Sort<\/td>\n<td>\u6392\u5e8f<\/td>\n<td>\u5927\u7ed3\u679c\u96c6\u6392\u5e8f\u5f88\u8d35<\/td>\n<\/tr>\n<\/table>\n<h2>\u4e09\u3001\u7d22\u5f15\u4f18\u5316\u5b9e\u6218<\/h2>\n<p>\u5047\u8bbe\u67e5\u8be2\u9891\u7e41\u6309 <code>CustomerId<\/code> \u8fc7\u6ee4\u5e76\u53d6 <code>OrderDate, Total<\/code>\uff1a<\/p>\n<pre><code>-- \u57fa\u7840\u975e\u805a\u96c6\u7d22\u5f15\nCREATE NONCLUSTERED INDEX IX_Orders_CustomerId\nON Orders(CustomerId);\n\n-- \u8986\u76d6\u7d22\u5f15\uff1a\u628a\u5e38\u7528\u5217 INCLUDE \u8fdb\u53bb\uff0c\u907f\u514d Key Lookup \u56de\u8868\nCREATE NONCLUSTERED INDEX IX_Orders_CustomerId_Cover\nON Orders(CustomerId)\nINCLUDE (OrderDate, Total);\n<\/code><\/pre>\n<p>\u52a0\u4e0a <code>INCLUDE<\/code> \u540e\uff0c\u6267\u884c\u8ba1\u5212\u91cc\u7684 Key Lookup \u4f1a\u6d88\u5931\uff0c\u903b\u8f91\u8bfb\u53d6\u4ece\u51e0\u5343\u964d\u5230\u4e2a\u4f4d\u6570\u3002<\/p>\n<h2>\u56db\u3001\u6700\u5e38\u89c1\u7684\u51e0\u4e2a\u5751<\/h2>\n<h3>1. \u5217\u4e0a\u5957\u51fd\u6570\uff0c\u7d22\u5f15\u5931\u6548<\/h3>\n<pre><code>-- \u4e0d\u4f1a\u8d70\u7d22\u5f15\nSELECT * FROM Orders WHERE YEAR(OrderDate) = 2026;\n-- \u6539\u5199\u540e\u8d70\u7d22\u5f15\nSELECT * FROM Orders WHERE OrderDate &gt;= '2026-01-01' AND OrderDate &lt; '2027-01-01';\n<\/code><\/pre>\n<h3>2. \u9690\u5f0f\u7c7b\u578b\u8f6c\u6362<\/h3>\n<p>\u5b57\u6bb5\u662f <code>varchar<\/code> \u4f46\u4f20\u5165 <code>nvarchar<\/code> \u53c2\u6570\uff0cSQL Server \u4f1a\u5bf9\u5217\u505a\u8f6c\u6362\uff0c\u5bfc\u81f4\u7d22\u5f15\u5931\u6548\u3002\u4fdd\u6301\u53c2\u6570\u7c7b\u578b\u4e0e\u5217\u4e00\u81f4\u3002<\/p>\n<h3>3. \u524d\u5bfc\u901a\u914d\u7b26<\/h3>\n<pre><code>-- \u524d\u5bfc % \u5fc5\u7136\u5168\u626b\u63cf\nSELECT * FROM Products WHERE Name LIKE '%\u624b\u673a%';\n-- \u540e\u5bfc % \u624d\u53ef\u80fd\u8d70\u7d22\u5f15\nSELECT * FROM Products WHERE Name LIKE 'iPhone%';\n<\/code><\/pre>\n<h2>\u4e94\u3001\u7edf\u8ba1\u4fe1\u606f\u522b\u5fd8\u4e86<\/h2>\n<p>\u4f18\u5316\u5668\u9760\u7edf\u8ba1\u4fe1\u606f\u4f30\u7b97\u884c\u6570\u3002\u5982\u679c\u8868\u957f\u671f\u5927\u91cf\u589e\u5220\u4f46\u7edf\u8ba1\u6ca1\u66f4\u65b0\uff0c\u4f18\u5316\u5668\u53ef\u80fd\u9009\u9519\u8ba1\u5212\u3002\u5b9a\u671f\uff1a<\/p>\n<pre><code>UPDATE STATISTICS Orders WITH FULLSCAN;\n<\/code><\/pre>\n<h2>\u5c0f\u7ed3<\/h2>\n<p>\u6267\u884c\u8ba1\u5212\u4e0d\u662f\u7384\u5b66\uff1a\u5148\u770b\u6709\u6ca1\u6709 Table Scan\u3001\u6709\u6ca1\u6709 Key Lookup\u3001\u903b\u8f91\u8bfb\u53d6\u5927\u4e0d\u5927\uff0c\u7136\u540e\u9488\u5bf9\u6027\u5efa\u8986\u76d6\u7d22\u5f15\u3001\u6539\u5199\u6cd5\u3001\u66f4\u65b0\u7edf\u8ba1\u3002\u4e09\u677f\u65a7\u4e0b\u6765\uff0c\u5927\u90e8\u5206 SQL Server \u6162\u67e5\u8be2\u90fd\u80fd\u89e3\u51b3\u3002<\/p>\n","protected":false},"excerpt":{"rendered":"<p>\u8bfb\u61c2 Table Scan \/ Index Seek \/ Key Lookup\uff0c\u7528\u8986\u76d6\u7d22\u5f15\u548c\u6539\u5199\u628a\u903b\u8f91\u8bfb\u53d6\u780d\u5230\u4e2a\u4f4d\u6570\u3002<\/p>\n","protected":false},"author":2,"featured_media":115,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[13],"tags":[],"class_list":["post-126","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-database"],"_links":{"self":[{"href":"https:\/\/fsdata.site\/index.php?rest_route=\/wp\/v2\/posts\/126","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/fsdata.site\/index.php?rest_route=\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/fsdata.site\/index.php?rest_route=\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/fsdata.site\/index.php?rest_route=\/wp\/v2\/users\/2"}],"replies":[{"embeddable":true,"href":"https:\/\/fsdata.site\/index.php?rest_route=%2Fwp%2Fv2%2Fcomments&post=126"}],"version-history":[{"count":0,"href":"https:\/\/fsdata.site\/index.php?rest_route=\/wp\/v2\/posts\/126\/revisions"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/fsdata.site\/index.php?rest_route=\/wp\/v2\/media\/115"}],"wp:attachment":[{"href":"https:\/\/fsdata.site\/index.php?rest_route=%2Fwp%2Fv2%2Fmedia&parent=126"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/fsdata.site\/index.php?rest_route=%2Fwp%2Fv2%2Fcategories&post=126"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/fsdata.site\/index.php?rest_route=%2Fwp%2Fv2%2Ftags&post=126"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}