{"id":179,"date":"2011-10-29T10:29:47","date_gmt":"2011-10-29T02:29:47","guid":{"rendered":"http:\/\/www.royalwzy.com\/?p=179"},"modified":"2013-12-30T14:16:43","modified_gmt":"2013-12-30T06:16:43","slug":"sql-server-2008-%e5%8f%82%e6%95%b0%e5%8c%96%e6%9f%a5%e8%af%a2","status":"publish","type":"post","link":"http:\/\/www.royalwzy.com\/?p=179","title":{"rendered":"SQL Server 2008 \u53c2\u6570\u5316\u67e5\u8be2"},"content":{"rendered":"

\u6211\u5c06\u8ba8\u8bba\u5982\u679c\u4e00\u4e2a\u67e5\u8be2\u53ef\u4ee5\u88ab\u53c2\u6570\u5316<\/span>,<\/span>\u90a3\u4e48<\/span>SQL Server<\/span>\u4f18\u5316\u5668\u600e\u6837\u5c1d\u8bd5\u5c06\u5176\u53c2\u6570\u5316<\/span>,<\/span>\u4ee5\u53ca\u4f60\u53ef\u4ee5\u600e\u6837\u5efa\u7acb\u4f60\u81ea\u5df1\u7684\u53c2\u6570\u5316\u67e5\u8be2<\/span>.<\/span><\/span><\/span><\/p>\n

1.<\/span>\u4ec0\u4e48\u662f\u53c2\u6570\u5316\u67e5\u8be2<\/span>?<\/span><\/span><\/span><\/span><\/p>\n

\u4e00\u4e2a\u7b80\u5355\u7406\u89e3\u53c2\u6570\u5316\u67e5\u8be2\u7684\u65b9\u5f0f\u662f\u628a\u5b83\u770b\u505a\u53ea\u662f\u4e00\u4e2a<\/span>T-SQL<\/span>\u67e5\u8be2<\/span>,<\/span>\u5b83\u63a5\u53d7\u63a7\u5236\u8fd9\u4e2a\u67e5\u8be2\u8fd4\u56de\u4ec0\u4e48\u7684\u53c2\u6570<\/span>.<\/span>\u901a\u8fc7\u4f7f\u7528\u4e0d\u540c\u7684\u53c2\u6570<\/span>,<\/span>\u4e00\u4e2a\u53c2\u6570\u5316\u67e5\u8be2\u8fd4\u56de\u4e0d\u540c\u7684\u7ed3\u679c<\/span>.<\/span>\u8981\u83b7\u5f97\u4e00\u4e2a\u53c2\u6570\u5316\u67e5\u8be2<\/span>,<\/span>\u4f60\u9700\u8981\u4ee5\u4e00\u79cd\u7279\u5b9a\u7684\u65b9\u5f0f\u6765\u7f16\u5199\u4f60\u7684\u4ee3\u7801<\/span>,<\/span>\u6216\u5b83\u9700\u8981\u6ee1\u8db3\u4e00\u7ec4\u7279\u5b9a\u7684\u6807\u51c6<\/span>.<\/span><\/span><\/span><\/span><\/span><\/p>\n

\u6709\u4e24\u79cd\u4e0d\u540c\u7684\u65b9\u5f0f\u6765\u521b\u5efa\u53c2\u6570\u5316\u67e5\u8be2<\/span>.<\/span>\u7b2c\u4e00\u4e2a\u65b9\u5f0f\u662f\u8ba9\u67e5\u8be2\u4f18\u5316\u5668\u81ea\u52a8\u5730\u53c2\u6570\u5316\u4f60\u7684\u67e5\u8be2<\/span>.<\/span>\u53e6\u4e00\u4e2a\u65b9\u5f0f\u662f\u901a\u8fc7\u4ee5\u4e00\u4e2a\u7279\u5b9a\u65b9\u5f0f\u6765\u7f16\u5199\u4f60\u7684<\/span>T-SQL<\/span>\u4ee3\u7801<\/span>,<\/span>\u5e76\u5c06\u5b83\u4f20\u9012\u7ed9<\/span>sp_executesql<\/span>\u7cfb\u7edf\u5b58\u50a8\u8fc7\u7a0b<\/span>,<\/span>\u4ece\u800c\u7f16\u7a0b\u4e00\u4e2a\u53c2\u6570\u5316\u67e5\u8be2<\/span>.<\/span>\u8fd9\u7bc7\u6587\u7ae0\u7684\u540e\u9762\u90e8\u5206\u5c06\u4ecb\u7ecd\u8fd9\u4e2a\u65b9\u6cd5<\/span>.<\/span><\/span><\/span><\/span><\/span><\/p>\n

\u53c2\u6570\u5316\u67e5\u8be2\u7684\u5173\u952e\u662f\u67e5\u8be2\u4f18\u5316\u5668\u5c06\u521b\u5efa\u4e00\u4e2a\u53ef\u4ee5\u91cd\u7528\u7684\u7f13\u5b58\u8ba1\u5212<\/span>.<\/span>\u901a\u8fc7\u81ea\u52a8\u5730\u6216\u7f16\u7a0b\u4f7f\u7528\u53c2\u6570\u5316\u67e5\u8be2<\/span>,SQL Server<\/span>\u53ef\u4ee5\u4f18\u5316\u7c7b\u4f3c<\/span>T-SQL<\/span>\u8bed\u53e5\u7684\u5904\u7406<\/span>.<\/span>\u8fd9\u4e2a\u4f18\u5316\u6d88\u9664\u4e86\u5bf9\u4f7f\u7528\u9ad8\u8d35\u8d44\u6e90\u4e3a\u8fd9\u4e9b\u7c7b\u4f3c<\/span>T-SQL<\/span>\u8bed\u53e5\u7684\u6bcf\u4e00\u6b21\u6267\u884c\u521b\u5efa\u4e00\u4e2a\u7f13\u5b58\u8ba1\u5212\u7684\u9700\u6c42<\/span>.<\/span>\u800c\u4e14\u901a\u8fc7\u521b\u5efa\u4e00\u4e2a\u53ef\u91cd\u7528\u8ba1\u5212<\/span>,SQL Server<\/span>\u8fd8\u51cf\u5c11\u4e86\u5b58\u653e\u8fc7\u7a0b\u7f13\u5b58\u4e2d\u7c7b\u4f3c\u7684\u6267\u884c\u8ba1\u5212\u6240\u9700\u7684\u5185\u5b58\u4f7f\u7528<\/span>.<\/span><\/span><\/span><\/span><\/span><\/p>\n

2.<\/span>\u73b0\u5728\u8ba9\u6211\u4eec\u770b\u770b\u4f7f\u5f97<\/span>SQL Server<\/span>\u521b\u5efa\u53c2\u6570\u5316\u67e5\u8be2\u7684\u4e0d\u540c\u65b9\u5f0f<\/span>.<\/span><\/span><\/span><\/span><\/span><\/p>\n

\u53c2\u6570\u5316\u67e5\u8be2\u662f\u600e\u6837\u81ea\u52a8\u521b\u5efa\u7684<\/span>?<\/span><\/span><\/span><\/span><\/span><\/p>\n

\u5fae\u8f6f\u7f16\u5199\u67e5\u8be2\u4f18\u5316\u5668\u4ee3\u7801\u7684\u4eba\u7aed\u5c3d\u5168\u529b\u5730\u4f18\u5316<\/span>SQL Server<\/span>\u5904\u7406\u4f60\u7684<\/span>T-SQL<\/span>\u547d\u4ee4\u7684\u65b9\u5f0f<\/span>.<\/span>\u6211\u60f3\u8fd9\u662f\u67e5\u8be2\u4f18\u5316\u5668\u540d\u79f0\u7684\u7531\u6765<\/span>.<\/span>\u8fd9\u4e9b\u5c3d\u91cf\u51cf\u5c11\u8d44\u6e90\u548c\u6700\u5927\u9650\u5ea6\u5730\u63d0\u9ad8\u67e5\u8be2\u4f18\u5316\u5668\u6267\u884c\u6027\u80fd\u7684\u65b9\u6cd5\u4e4b\u4e00\u662f\u67e5\u770b\u4e00\u4e2a<\/span>T-SQL<\/span>\u8bed\u53e5\u5e76\u786e\u5b9a\u5b83\u4eec\u662f\u5426\u53ef\u4ee5\u88ab\u53c2\u6570\u5316<\/span>.<\/span>\u8981\u4e86\u89e3\u8fd9\u662f\u5982\u4f55\u5de5\u4f5c\u7684<\/span>,<\/span>\u8ba9\u6211\u4eec\u770b\u770b\u4e0b\u9762\u7684<\/span>T-SQL<\/span>\u8bed\u53e5<\/span>:<\/span><\/span><\/span><\/span><\/span><\/p>\n

SELECT * FROM AdventureWorks.Sales.SalesOrderHeader<\/span><\/span><\/p>\n

WHERE SalesOrderID = 56000;<\/span><\/span><\/p>\n

GO<\/span><\/span><\/p>\n

\u5728\u8fd9\u91cc<\/span>,<\/span>\u4f60\u53ef\u4ee5\u770b\u5230\u8fd9\u4e2a\u547d\u4ee4\u6709\u4e24\u4e2a\u7279\u70b9<\/span>.<\/span>\u7b2c\u4e00\u5b83\u7b80\u5355<\/span>,<\/span>\u7b2c\u4e8c\u5b83\u5728<\/span>WHERE<\/span>\u8c13\u8bcd\u4e2d\u5305\u542b\u4e00\u4e2a\u7528\u4e8e<\/span>SalesOrderID<\/span>\u503c\u7684\u6307\u5b9a\u503c<\/span>.<\/span>\u67e5\u8be2\u4f18\u5316\u5668\u53ef\u4ee5\u8bc6\u522b\u8fd9\u4e2a\u67e5\u8be2\u6bd4\u8f83\u7b80\u5355\u4ee5\u53ca<\/span>SalesOrderID<\/span>\u6709\u4e00\u4e2a\u53c2\u6570<\/span>(“56000”).<\/span>\u56e0\u6b64<\/span>,<\/span>\u67e5\u8be2\u4f18\u5316\u5668\u53ef\u4ee5\u81ea\u52a8\u5730\u53c2\u6570\u5316\u8fd9\u4e2a\u67e5\u8be2<\/span>.<\/span><\/span><\/span><\/span><\/span><\/p>\n

\u5982\u679c\u4f60\u4f7f\u7528\u4e0b\u9762\u7684<\/span>SELECT<\/span>\u8bed\u53e5\u6765\u67e5\u770b\u4e00\u4e2a\u53ea\u5305\u542b\u7528\u4e8e\u4e0a\u9762\u8bed\u53e5\u7684\u7f13\u5b58\u8ba1\u5212\u7684<\/span>,<\/span>\u5e72\u51c0\u7684\u7f13\u51b2\u6c60<\/span>,<\/span>\u90a3\u4e48\u4f60\u4f1a\u770b\u5230\u67e5\u8be2\u4f18\u5316\u5668\u5c06<\/span>T-SQL<\/span>\u67e5\u8be2\u91cd\u5199\u4e3a\u4e00\u4e2a\u53c2\u6570\u5316<\/span>T-SQL<\/span>\u8bed\u53e5<\/span>:<\/span><\/span><\/span><\/span><\/span><\/p>\n

SELECT stats.execution_count AS cnt, p.size_in_bytes AS [size], [sql].[text] AS [plan_text]<\/span><\/span><\/p>\n

FROM sys.dm_exec_cached_plans p<\/span><\/span><\/p>\n

OUTER APPLY sys.dm_exec_sql_text (p.plan_handle) sql<\/span><\/span><\/p>\n

JOIN sys.dm_exec_query_stats stats ON stats.plan_handle = p.plan_handle<\/span><\/span><\/p>\n

GO<\/span><\/span><\/p>\n

\u5f53\u6211\u5728\u4e00\u4e2a<\/span>SQL Server 2008<\/span>\u5b9e\u4f8b\u4e0a\u8fd0\u884c\u8fd9\u4e2a\u547d\u4ee4\u65f6<\/span>,<\/span>\u6211\u5f97\u5230\u4e0b\u9762\u7684\u8f93\u51fa<\/span>,(<\/span>\u6ce8\u610f<\/span>,<\/span>\u8f93\u51fa\u88ab\u91cd\u65b0\u683c\u5f0f\u5316\u4e86<\/span>,<\/span>\u4ee5\u4fbf\u5b83\u66f4\u6613\u8bfb<\/span>):<\/span><\/span><\/span><\/span><\/span><\/p>\n

\"\"<\/span><\/span><\/p>\n

\u5982\u679c\u4f60\u770b\u770b\u4e0a\u9762\u8f93\u51fa\u4e2d\u7684<\/span>plan_text<\/span>\u5b57\u6bb5<\/span>,<\/span>\u4f60\u4f1a\u770b\u5230\u5b83\u4e0d\u50cf\u539f\u6765\u7684<\/span>T-SQL<\/span>\u6587\u672c<\/span>.<\/span>\u5982\u524d\u6240\u8ff0<\/span>,<\/span>\u67e5\u8be2\u4f18\u5316\u5668\u5c06\u8fd9\u4e2a\u67e5\u8be2\u91cd\u65b0\u7f16\u5199\u4e3a\u4e00\u4e2a\u53c2\u6570\u5316<\/span>T-SQL<\/span>\u8bed\u53e5<\/span>.<\/span>\u5728\u8fd9\u91cc<\/span>,<\/span>\u4f60\u53ef\u4ee5\u770b\u5230\u5b83\u73b0\u5728\u6709\u4e00\u4e2a\u6570\u636e\u7c7b\u578b\u4e3a<\/span>(int)<\/span>\u7684\u53d8\u91cf<\/span>(@1),<\/span>\u5b83\u5728\u4e4b\u524d\u7684<\/span>SELECT<\/span>\u8bed\u53e5\u4e2d\u88ab\u5b9a\u4e49\u7684<\/span>.<\/span>\u53e6\u5916\u5728<\/span>plan_text<\/span>\u7684\u672b\u5c3e<\/span>,<\/span>\u503c<\/span>“56000”<\/span>\u88ab\u66ff\u6362\u4e3a\u53d8\u91cf<\/span>@1.<\/span>\u65e2\u7136\u8fd9\u4e2a<\/span>T-SQL<\/span>\u8bed\u53e5\u88ab\u91cd\u5199\u4e86<\/span>,<\/span>\u800c\u4e14\u88ab\u5b58\u50a8\u4e3a\u4e00\u4e2a\u7f13\u5b58\u8ba1\u5212<\/span>,<\/span>\u90a3\u4e48\u5982\u679c\u672a\u6765\u4e00\u4e2a<\/span>T-SQL<\/span>\u547d\u4ee4\u548c\u5b83\u5927\u81f4\u76f8\u540c<\/span>,<\/span>\u53ea\u6709<\/span>SalesOrderID<\/span>\u5b57\u6bb5\u88ab\u8d4b\u7684\u503c\u4e0d\u540c\u7684\u8bdd<\/span>,<\/span>\u5b83\u5c31\u53ef\u4ee5\u88ab\u7528\u4e8e\u91cd\u7528<\/span>.<\/span>\u8ba9\u6211\u4eec\u5728\u52a8\u4f5c\u4e2d\u770b\u770b\u5b83<\/span>.<\/span><\/span><\/span><\/span><\/span><\/p>\n

\u5982\u679c\u6211\u5728\u6211\u7684\u673a\u5668\u4e0a\u8fd0\u884c\u4e0b\u9762\u7684\u547d\u4ee4<\/span>:<\/span><\/span><\/span><\/span><\/span><\/p>\n

DBCC FREEPROCCACHE<\/span><\/span><\/p>\n

GO<\/span><\/span><\/p>\n

SELECT * FROM AdventureWorks.Sales.SalesOrderHeader<\/span><\/span><\/p>\n

WHERE SalesOrderID = 56000;<\/span><\/span><\/p>\n

GO<\/span><\/span><\/p>\n

SELECT * FROM AdventureWorks.Sales.SalesOrderHeader<\/span><\/span><\/p>\n

WHERE SalesOrderID = 56001;<\/span><\/span><\/p>\n

GO<\/span><\/span><\/p>\n

SELECT stats.execution_count AS cnt, p.size_in_bytes AS [size], [sql].[text] AS [plan_text]<\/span><\/span><\/p>\n

FROM sys.dm_exec_cached_plans p<\/span><\/span><\/p>\n

OUTER APPLY sys.dm_exec_sql_text (p.plan_handle) sql<\/span><\/span><\/p>\n

JOIN sys.dm_exec_query_stats stats ON stats.plan_handle = p.plan_handle<\/span><\/span><\/p>\n

GO<\/span><\/span><\/p>\n

\u6211\u4ece\u6700\u540e\u7684<\/span>SELECT<\/span>\u8bed\u53e5\u5f97\u5230\u4e0b\u9762\u7684\u8f93\u51fa<\/span>,(<\/span>\u6ce8\u610f<\/span>,<\/span>\u8f93\u51fa\u88ab\u91cd\u65b0\u683c\u5f0f\u5316\u4ee5\u4fbf\u5b83\u66f4\u6613\u8bfb<\/span>):<\/span><\/span><\/span><\/span><\/span><\/p>\n

\"\"<\/span><\/span><\/p>\n

\u5728\u8fd9\u91cc<\/span>,<\/span>\u6211\u9996\u5148\u91ca\u653e\u8fc7\u7a0b\u7f13\u5b58<\/span>,<\/span>\u7136\u540e\u6211\u6267\u884c\u4e24\u4e2a\u4e0d\u540c\u3001\u4f46\u5374\u7c7b\u4f3c\u7684\u975e\u53c2\u6570\u5316\u67e5\u8be2\u6765\u770b\u770b\u67e5\u8be2\u4f18\u5316\u5668\u662f\u4f1a\u521b\u5efa\u4e24\u4e2a\u4e0d\u540c\u7684\u7f13\u5b58\u8ba1\u5212\u8fd8\u662f\u521b\u5efa\u7528\u4e8e\u8fd9\u4e24\u4e2a\u67e5\u8be2\u7684\u4e00\u4e2a\u7f13\u5b58\u8ba1\u5212<\/span>.<\/span>\u5728\u8fd9\u91cc<\/span>,<\/span>\u4f60\u53ef\u4ee5\u770b\u5230\u67e5\u8be2\u4f18\u5316\u5668\u4e8b\u5b9e\u4e0a\u5f88\u806a\u660e<\/span>,<\/span>\u5b83\u53c2\u6570\u5316\u7b2c\u4e00\u4e2a\u67e5\u8be2\u5e76\u7f13\u5b58\u4e86\u8ba1\u5212<\/span>.<\/span>\u7136\u540e\u5f53\u7b2c\u4e8c\u4e2a\u7c7b\u4f3c\u3001\u4f46\u6709\u4e00\u4e2a\u4e0d\u540c\u7684<\/span>SalesOrderID<\/span>\u503c\u7684\u67e5\u8be2\u53d1\u9001\u5230<\/span>SQL Server<\/span>\u65f6<\/span>,<\/span>\u4f18\u5316\u5668\u53ef\u4ee5\u8bc6\u522b\u5df2\u7ecf\u7f13\u5b58\u4e86\u4e00\u4e2a\u8ba1\u5212<\/span>,<\/span>\u7136\u540e\u91cd\u7528\u5b83\u6765\u5904\u7406\u7b2c\u4e8c\u4e2a\u67e5\u8be2<\/span>.<\/span>\u4f60\u53ef\u4ee5\u8fd9\u4e48\u8bf4\u662f\u56e0\u4e3a<\/span>“cnt”<\/span>\u5b57\u6bb5\u73b0\u5728\u8868\u660e\u8fd9\u4e2a\u8ba1\u5212\u88ab\u7528\u4e86\u4e24\u6b21<\/span>.<\/span><\/span><\/span><\/span><\/span><\/p>\n

3.<\/span>\u6570\u636e\u5e93\u914d\u7f6e\u9009\u9879<\/span>PARAMETERIZATION<\/span>\u53ef\u4ee5\u5f71\u54cd<\/span>T-SQL<\/span>\u8bed\u53e5\u600e\u6837\u88ab\u81ea\u52a8\u5730\u53c2\u6570\u5316<\/span>.<\/span>\u5bf9\u4e8e\u8fd9\u4e2a\u9009\u9879\u6709\u4e24\u79cd\u4e0d\u540c\u7684\u8bbe\u7f6e<\/span>,SIMPLE<\/span>\u548c<\/span>FORCED.<\/span>\u5f53<\/span>PARAMETERIZATION<\/span>\u8bbe\u7f6e\u88ab\u8bbe\u7f6e\u4e3a<\/span>SIMPLE<\/span>\u65f6<\/span>,<\/span>\u53ea\u6709\u7b80\u5355\u7684<\/span>T-SQL<\/span>\u8bed\u53e5\u624d\u4f1a\u88ab\u53c2\u6570\u5316<\/span>.<\/span>\u8981\u4ecb\u7ecd\u8fd9\u4e2a<\/span>,<\/span>\u770b\u4e0b\u4e0b\u9762\u7684\u547d\u4ee4<\/span>:<\/span><\/span><\/span><\/span><\/span><\/p>\n

SELECT SUM(LineTotal) AS LineTotal<\/span><\/span><\/p>\n

FROM AdventureWorks.Sales.SalesOrderHeader H<\/span><\/span><\/p>\n

JOIN AdventureWorks.Sales.SalesOrderDetail D ON D.SalesOrderID = H.SalesOrderID<\/span><\/span><\/p>\n

WHERE H.SalesOrderID = 56000<\/span><\/span><\/p>\n

\u8fd9\u4e2a\u67e5\u8be2\u7c7b\u4f3c\u4e8e\u6211\u524d\u9762\u7684\u793a\u4f8b<\/span>,<\/span>\u9664\u4e86\u5728\u8fd9\u91cc\u6211\u6dfb\u52a0\u4e86\u4e00\u4e2a\u989d\u5916\u7684<\/span>JOIN<\/span>\u6807\u51c6<\/span>.<\/span>\u5f53\u6570\u636e\u5e93<\/span>AdventureWorks<\/span>\u7684<\/span>PARAMETERIZATION<\/span>\u9009\u9879\u88ab\u8bbe\u7f6e\u4e3a<\/span>SIMPLE<\/span>\u65f6<\/span>,<\/span>\u8fd9\u4e2a\u67e5\u8be2\u4e0d\u4f1a\u88ab\u81ea\u52a8\u5730\u53c2\u6570\u5316<\/span>.SIMPLE PARAMETERIZATION<\/span>\u8bbe\u7f6e\u544a\u8bc9\u67e5\u8be2\u4f18\u5316\u5668\u53ea\u53c2\u6570\u5316\u7b80\u5355\u7684\u67e5\u8be2<\/span>.<\/span>\u4f46\u662f\u5f53\u9009\u9879<\/span>PARAMETERIZATION<\/span>\u88ab\u8bbe\u7f6e\u4e3a<\/span>FORCED<\/span>\u65f6<\/span>,<\/span>\u8fd9\u4e2a\u67e5\u8be2\u5c06\u88ab\u81ea\u52a8\u5730\u53c2\u6570\u5316<\/span>.<\/span><\/span><\/span><\/span><\/span><\/p>\n

\u5f53\u4f60\u8bbe\u7f6e\u6570\u636e\u5e93\u9009\u9879\u4e3a\u4f7f\u7528<\/span>FORCE PARAMETERIZATION<\/span>\u65f6<\/span>,<\/span>\u67e5\u8be2\u4f18\u5316\u5668\u8bd5\u56fe\u53c2\u6570\u5316\u6240\u6709\u7684\u67e5\u8be2<\/span>,<\/span>\u800c\u4e0d\u4ec5\u4ec5\u662f\u7b80\u5355\u7684\u67e5\u8be2<\/span>.<\/span>\u4f60\u53ef\u80fd\u4f1a\u8ba4\u4e3a\u8fd9\u5f88\u597d<\/span>.<\/span>\u4f46\u662f\u5728\u67d0\u4e9b\u60c5\u51b5\u4e0b<\/span>,<\/span>\u5f53\u6570\u636e\u5e93\u8bbe\u7f6e<\/span>PARAMETERIZATION<\/span>\u4e3a<\/span>FORCED<\/span>\u65f6<\/span>,<\/span>\u67e5\u8be2\u4f18\u5316\u5668\u5c06\u9009\u62e9\u4e0d\u662f\u5f88\u7406\u60f3\u7684\u67e5\u8be2\u8ba1\u5212<\/span>.<\/span>\u5f53\u6570\u636e\u5e93\u8bbe\u7f6e<\/span>PARAMETER<\/span>\u4e3a<\/span>FORCED<\/span>\u65f6<\/span>,<\/span>\u5b83\u6539\u53d8\u67e5\u8be2\u4e2d\u7684\u5b57\u9762\u5e38\u91cf<\/span>.<\/span>\u8fd9\u53ef\u80fd\u5bfc\u81f4\u5f53\u67e5\u8be2\u4e2d\u6d89\u53ca\u8ba1\u7b97\u5b57\u6bb5\u65f6\u7d22\u5f15\u548c\u7d22\u5f15\u89c6\u56fe\u4e0d\u88ab\u9009\u4e2d\u53c2\u4e0e\u5230\u6267\u884c\u8ba1\u5212\u4e2d<\/span>,<\/span>\u4ece\u800c\u5bfc\u81f4\u4e00\u4e2a\u65e0\u6548\u7684\u8ba1\u5212<\/span>.FORCED PARAMETERIZATION<\/span>\u9009\u9879\u53ef\u80fd\u662f\u6539\u8fdb\u5177\u6709\u5927\u91cf\u7c7b\u4f3c\u7684\u3001\u4f20\u9012\u8fc7\u6765\u7684\u53c2\u6570\u7a0d\u6709\u4e0d\u540c\u7684\u67e5\u8be2\u7684\u6570\u636e\u5e93\u6027\u80fd\u7684\u4e00\u4e2a\u5f88\u597d\u7684\u89e3\u51b3\u65b9\u6848<\/span>.<\/span>\u4e00\u4e2a\u5728\u7ebf\u9500\u552e\u5e94\u7528\u7a0b\u5e8f<\/span>,<\/span>\u5b83\u7684\u5ba2\u6237\u5bf9\u4f60\u7684\u4ea7\u54c1\u6267\u884c\u5927\u91cf\u7684\u7c7b\u4f3c\u641c\u7d22<\/span>,\u00a0<\/span>\u4ea7\u54c1\u503c\u4e0d\u540c<\/span>,<\/span>\u8fd9\u53ef\u80fd\u662f\u4e00\u4e2a\u80fd\u591f\u53d7\u76ca\u4e8e<\/span>FORCED PARAMETERIZATION<\/span>\u7684\u5f88\u597d\u7684\u5e94\u7528\u7a0b\u5e8f\u7c7b\u578b<\/span>.<\/span><\/span><\/span><\/span><\/span><\/p>\n

\u4e0d\u662f\u6240\u6709\u7684\u67e5\u8be2\u4ece\u53e5\u90fd\u4f1a\u88ab\u53c2\u6570\u5316<\/span>.<\/span>\u4f8b\u5982\u67e5\u8be2\u7684<\/span>TOP<\/span>\u3001<\/span>TABLESAMPLE<\/span>\u3001<\/span>\u00a0HAVING<\/span>\u3001<\/span>GROUP BY<\/span>\u3001<\/span>ORDER BY<\/span>\u3001<\/span>OUTPUT…INTO<\/span>\u6216<\/span>FOR XML<\/span>\u4ece\u53e5\u4e0d\u4f1a\u88ab\u53c2\u6570\u5316<\/span>.<\/span><\/span><\/span><\/span><\/span><\/p>\n

4.<\/span>\u4f7f\u7528<\/span>sp_execute_sql<\/span>\u6765\u53c2\u6570\u5316\u4f60\u7684<\/span>T-SQL<\/span><\/span><\/span><\/span><\/span><\/p>\n

\u4f60\u4e0d\u9700\u8981\u4f9d\u8d56\u4e8e\u6570\u636e\u5e93\u7684<\/span>PARAMETERIZATION<\/span>\u9009\u9879\u6765\u4f7f\u5f97\u67e5\u8be2\u4f18\u5316\u5668\u53c2\u6570\u5316\u4e00\u4e2a\u67e5\u8be2<\/span>.<\/span>\u4f60\u53ef\u4ee5\u53c2\u6570\u5316\u4f60\u81ea\u5df1\u7684\u67e5\u8be2<\/span>.<\/span>\u4f60\u901a\u8fc7\u91cd\u65b0\u7f16\u5199\u4f60\u7684<\/span>T-SQL<\/span>\u8bed\u53e5\u5e76\u4f7f\u7528\u201d<\/span>sp_executesql<\/span>\u201d\u7cfb\u7edf\u5b58\u50a8\u8fc7\u7a0b\u6267\u884c\u91cd\u5199\u7684\u8bed\u53e5\u6765\u5b9e\u73b0<\/span>.<\/span>\u6b63\u5982\u5df2\u7ecf\u770b\u5230\u7684<\/span>,<\/span>\u4e0a\u9762\u5305\u62ec\u4e00\u4e2a<\/span>“JOIN”<\/span>\u4ece\u53e5\u7684<\/span>SELECT<\/span>\u8bed\u53e5\u5728\u6570\u636e\u5e93\u7684<\/span>PARAMETERIZATION<\/span>\u8bbe\u7f6e\u4e3a<\/span>SIMPLE<\/span>\u65f6\u6ca1\u6709\u88ab\u81ea\u52a8\u53c2\u6570\u5316<\/span>.<\/span>\u8ba9\u6211\u91cd\u65b0\u7f16\u5199\u8fd9\u4e2a\u67e5\u8be2\u4ee5\u4fbf\u67e5\u8be2\u4f18\u5316\u5668\u5c06\u521b\u5efa\u4e00\u4e2a\u53ef\u91cd\u7528\u7684\u53c2\u6570\u5316\u67e5\u8be2\u6267\u884c\u8ba1\u5212<\/span>.<\/span><\/span><\/span><\/span><\/span><\/p>\n

\u4e3a\u4e86\u8bf4\u660e<\/span>,<\/span>\u8ba9\u6211\u4eec\u770b\u4e24\u4e2a\u7c7b\u4f3c\u7684\u3001\u4e0d\u4f1a\u88ab\u81ea\u52a8\u53c2\u6570\u5316\u7684<\/span>T-SQL<\/span>\u8bed\u53e5<\/span>,<\/span>\u5e76\u521b\u5efa\u4e24\u4e2a\u4e0d\u540c\u7684\u7f13\u5b58\u6267\u884c\u8ba1\u5212<\/span>.<\/span>\u7136\u540e\u6211\u5c06\u91cd\u65b0\u7f16\u5199\u8fd9\u4e24\u4e2a\u67e5\u8be2\u4f7f\u5f97\u5b83\u4eec\u90fd\u4f7f\u7528\u76f8\u540c\u7684\u7f13\u5b58\u53c2\u6570\u5316\u6267\u884c\u8ba1\u5212<\/span>.<\/span><\/span><\/span><\/span><\/span><\/p>\n

\u8ba9\u6211\u4eec\u770b\u770b\u8fd9\u4e2a\u4ee3\u7801<\/span>:<\/span><\/span><\/span><\/span><\/span><\/p>\n

DBCC FREEPROCCACHE<\/span><\/span><\/p>\n

GO<\/span><\/span><\/p>\n

SELECT SUM(LineTotal) AS LineTotal<\/span><\/span><\/p>\n

FROM AdventureWorks.Sales.SalesOrderHeader H<\/span><\/span><\/p>\n

JOIN AdventureWorks.Sales.SalesOrderDetail D ON D.SalesOrderID = H.SalesOrderID<\/span><\/span><\/p>\n

WHERE H.SalesOrderID = 56000<\/span><\/span><\/p>\n

GO<\/span><\/span><\/p>\n

SELECT SUM(LineTotal) AS LineTotal<\/span><\/span><\/p>\n

FROM AdventureWorks.Sales.SalesOrderHeader H<\/span><\/span><\/p>\n

JOIN AdventureWorks.Sales.SalesOrderDetail D ON D.SalesOrderID = H.SalesOrderID<\/span><\/span><\/p>\n

WHERE H.SalesOrderID = 56001<\/span><\/span><\/p>\n

GO<\/span><\/span><\/p>\n

SELECT stats.execution_count AS cnt, p.size_in_bytes AS [size], [sql].[text] AS [plan_text]<\/span><\/span><\/p>\n

FROM sys.dm_exec_cached_plans p<\/span><\/span><\/p>\n

OUTER APPLY sys.dm_exec_sql_text (p.plan_handle) sql<\/span><\/span><\/p>\n

JOIN sys.dm_exec_query_stats stats ON stats.plan_handle = p.plan_handle<\/span><\/span><\/p>\n

GO<\/span><\/span><\/p>\n

\u5728\u8fd9\u91cc<\/span>,<\/span>\u6211\u91ca\u653e\u4e86\u8fc7\u7a0b\u7f13\u5b58<\/span>,<\/span>\u7136\u540e\u8fd0\u884c\u8fd9\u4e24\u4e2a\u5305\u542b\u4e00\u4e2a<\/span>JOIN<\/span>\u7684\u3001\u4e0d\u540c\u7684\u975e\u7b80\u5355\u7684<\/span>T-SQL<\/span>\u8bed\u53e5<\/span>.<\/span>\u7136\u540e\u6211\u5c06\u68c0\u67e5\u7f13\u5b58\u8ba1\u5212<\/span>.<\/span>\u8fd9\u662f\u8fd9\u4e2a\u4f7f\u7528<\/span>DMV\u00a0<\/span>\u7684<\/span>SELECT<\/span>\u8bed\u53e5\u7684\u8f93\u51fa<\/span>(<\/span>\u6ce8\u610f<\/span>,<\/span>\u8f93\u51fa\u88ab\u91cd\u65b0\u683c\u5f0f\u5316\u4e86<\/span>,<\/span>\u4ee5\u4fbf\u5b83\u66f4\u6613\u8bfb<\/span>):<\/span><\/span><\/span><\/span><\/span><\/p>\n

\"\"<\/span><\/span><\/p>\n

\u6b63\u5982\u4f60\u4ece\u8fd9\u4e2a\u8f93\u51fa\u770b\u5230\u7684<\/span>,<\/span>\u8fd9\u4e24\u4e2a<\/span>SELECT<\/span>\u8bed\u53e5\u6ca1\u6709\u88ab\u67e5\u8be2\u4f18\u5316\u5668\u53c2\u6570\u5316<\/span>.<\/span>\u4f18\u5316\u5668\u521b\u5efa\u4e86\u4e24\u4e2a\u4e0d\u540c\u7684\u7f13\u5b58\u6267\u884c\u8ba1\u5212<\/span>,<\/span>\u6bcf\u4e00\u4e2a\u90fd\u53ea\u88ab\u6267\u884c\u4e86\u4e00\u6b21<\/span>.<\/span>\u6211\u4eec\u53ef\u4ee5\u901a\u8fc7\u4f7f\u7528<\/span>sp_executesql<\/span>\u7cfb\u7edf\u5b58\u50a8\u8fc7\u7a0b\u6765\u5e2e\u52a9\u4f18\u5316\u5668\u4e3a\u8fd9\u4e24\u4e2a\u4e0d\u540c\u7684<\/span>SELECT<\/span>\u8bed\u53e5\u521b\u5efa\u4e00\u4e2a\u53c2\u6570\u5316\u6267\u884c\u8ba1\u5212<\/span>.<\/span><\/span><\/span><\/span><\/span><\/p>\n

\u4e0b\u9762\u662f\u4e0a\u9762\u7684\u4ee3\u7801\u88ab\u91cd\u65b0\u7f16\u5199\u6765\u4f7f\u7528<\/span>sp_executesql\u00a0<\/span>\u7cfb\u7edf\u5b58\u50a8\u8fc7\u7a0b<\/span>:<\/span><\/span><\/span><\/span><\/span><\/p>\n

DBCC FREEPROCCACHE<\/span><\/span><\/p>\n

GO<\/span><\/span><\/p>\n

EXEC sp_executesql N’SELECT SUM(LineTotal) AS LineTotal<\/span><\/span><\/p>\n

FROM AdventureWorks.Sales.SalesOrderHeader H<\/span><\/span><\/p>\n

JOIN AdventureWorks.Sales.SalesOrderDetail D ON D.SalesOrderID = H.SalesOrderID<\/span><\/span><\/p>\n

WHERE H.SalesOrderID = @SalesOrderID’, N’@SalesOrderID INT’, @SalesOrderID = 56000<\/span><\/span><\/p>\n

GO<\/span><\/span><\/p>\n

EXEC sp_executesql N’SELECT SUM(LineTotal) AS LineTotal<\/span><\/span><\/p>\n

FROM AdventureWorks.Sales.SalesOrderHeader H<\/span><\/span><\/p>\n

JOIN AdventureWorks.Sales.SalesOrderDetail D ON D.SalesOrderID = H.SalesOrderID<\/span><\/span><\/p>\n

WHERE H.SalesOrderID = @SalesOrderID’, N’@SalesOrderID INT’, @SalesOrderID = 56001<\/span><\/span><\/p>\n

GO<\/span><\/span><\/p>\n

SELECT stats.execution_count AS cnt, p.size_in_bytes AS [size], [sql].[text] AS [plan_text]<\/span><\/span><\/p>\n

FROM sys.dm_exec_cached_plans p<\/span><\/span><\/p>\n

OUTER APPLY sys.dm_exec_sql_text (p.plan_handle) sql<\/span><\/span><\/p>\n

JOIN sys.dm_exec_query_stats stats ON stats.plan_handle = p.plan_handle<\/span><\/span><\/p>\n

GO<\/span><\/span><\/p>\n

\u5982\u540c\u4f60\u6240\u770b\u5230\u7684<\/span>,<\/span>\u6211\u91cd\u65b0\u7f16\u5199\u4e86\u8fd9\u4e24\u4e2a<\/span>SELECT<\/span>\u8bed\u53e5<\/span>,<\/span>\u4f7f\u5b83\u4eec\u901a\u8fc7\u4f7f\u7528\u201d<\/span>EXEC sp_executesql<\/span>\u201d\u8bed\u53e5\u6765\u6267\u884c<\/span>.<\/span>\u5bf9\u8fd9\u4e9b<\/span>EXEC<\/span>\u8bed\u53e5\u4e2d\u7684\u6bcf\u4e00\u4e2a<\/span>,<\/span>\u6211\u90fd\u4f20\u9012\u4e09\u4e2a\u4e0d\u540c\u7684\u53c2\u6570<\/span>.<\/span>\u7b2c\u4e00\u4e2a\u53c2\u6570\u662f\u57fa\u672c\u7684<\/span>SELECT<\/span>\u8bed\u53e5<\/span>,<\/span>\u4f46\u662f\u6211\u5c06<\/span>SalesOrderID<\/span>\u7684\u503c\u7528\u4e00\u4e2a\u53d8\u91cf<\/span>(@SalesOrderID)<\/span>\u66ff\u4ee3<\/span>.<\/span>\u5728\u7b2c\u4e8c\u4e2a\u53c2\u6570\u4e2d<\/span>,<\/span>\u6211\u786e\u5b9a\u4e86<\/span>@SalesOrderID<\/span>\u7684\u6570\u636e\u7c7b\u578b<\/span>,<\/span>\u5728\u8fd9\u4e2a\u4f8b\u5b50\u4e2d\u5b83\u662f\u4e00\u4e2a<\/span>integer.<\/span>\u7136\u540e\u5728\u6700\u540e\u4e00\u4e2a\u53c2\u6570\u4e2d<\/span>,<\/span>\u6211\u4f20\u9012\u4e86<\/span>SalesOrderID<\/span>\u7684\u503c<\/span>.<\/span>\u8fd9\u4e2a\u53c2\u6570\u5c06\u63a7\u5236\u6211\u7684<\/span>SELECT<\/span>\u6839\u636e<\/span>SalesOrderID<\/span>\u503c\u6240\u751f\u6210\u7684\u7ed3\u679c<\/span>.sp_executesql<\/span>\u7684\u6bcf\u6b21\u6267\u884c\u4e2d\u524d\u4e24\u4e2a\u53c2\u6570\u90fd\u662f\u4e00\u6837\u7684<\/span>.<\/span>\u4f46\u662f\u7b2c\u4e09\u4e2a\u53c2\u6570\u4e0d\u540c<\/span>,<\/span>\u56e0\u4e3a\u6bcf\u4e2a\u90fd\u6709\u4e0d\u540c\u7684<\/span>SalesOrderID<\/span>\u503c<\/span>.<\/span><\/span><\/span><\/span><\/span><\/p>\n

\u73b0\u5728\u5f53\u6211\u8fd0\u884c\u4e0a\u9762\u7684\u4ee3\u7801\u65f6<\/span>,<\/span>\u6211\u4ece<\/span>DMV SELECT<\/span>\u8bed\u53e5\u5f97\u5230\u4e0b\u9762\u7684\u8f93\u51fa<\/span>(<\/span>\u6ce8\u610f<\/span>,<\/span>\u8f93\u51fa\u88ab\u91cd\u65b0\u683c\u5f0f\u5316\u4e86<\/span>,<\/span>\u4ee5\u4fbf\u5b83\u66f4\u6613\u8bfb<\/span>):<\/span><\/span><\/span><\/span><\/span><\/p>\n

\"\"<\/span><\/span><\/p>\n

\u4ece\u8fd9\u4e2a\u8f93\u51fa<\/span>,<\/span>\u4f60\u53ef\u4ee5\u770b\u51fa<\/span>,<\/span>\u6211\u6709\u4e00\u4e2a\u53c2\u6570\u5316\u7f13\u5b58\u8ba1\u5212<\/span>,<\/span>\u5b83\u88ab\u6267\u884c\u4e86\u4e24\u6b21<\/span>,<\/span>\u4e3a\u6bcf\u4e2a<\/span>EXEC<\/span>\u8bed\u53e5\u5404\u6267\u884c\u4e86\u4e00\u6b21<\/span>.<\/span><\/span><\/span><\/span><\/span><\/p>\n

\u4f7f\u7528\u53c2\u6570\u5316\u67e5\u8be2\u6765\u8282\u7701\u8d44\u6e90\u548c\u4f18\u5316\u6027\u80fd<\/span><\/span><\/p>\n

\u5728\u8bed\u53e5\u53ef\u4ee5\u88ab\u6267\u884c\u4e4b\u524d<\/span>,<\/span>\u6bcf\u4e2a<\/span>T-SQL<\/span>\u8bed\u53e5\u90fd\u9700\u8981\u88ab\u8bc4\u4f30<\/span>,<\/span>\u800c\u4e14\u9700\u8981\u5efa\u7acb\u4e00\u4e2a\u6267\u884c\u8ba1\u5212<\/span>.<\/span>\u521b\u5efa\u6267\u884c\u8ba1\u5212\u4f1a\u5360\u7528\u5b9d\u8d35\u7684<\/span>CPU<\/span>\u8d44\u6e90<\/span>.<\/span>\u5f53\u6267\u884c\u8ba1\u5212\u88ab\u521b\u5efa\u540e<\/span>,<\/span>\u5b83\u4f7f\u7528\u5185\u5b58\u7a7a\u95f4\u5c06\u5b83\u5b58\u50a8\u5728\u8fc7\u7a0b\u7f13\u5b58\u4e2d<\/span>.<\/span>\u964d\u4f4e<\/span>CPU<\/span>\u548c\u5185\u5b58\u4f7f\u7528\u7684\u4e00\u4e2a\u65b9\u6cd5\u662f\u5229\u7528\u53c2\u6570\u5316\u67e5\u8be2<\/span>.<\/span>\u5c3d\u7ba1\u6570\u636e\u5e93\u53ef\u4ee5\u88ab\u8bbe\u7f6e\u4e3a\u5bf9\u6240\u6709\u67e5\u8be2<\/span>FORCE<\/span>\u53c2\u6570\u5316<\/span>,<\/span>\u4f46\u662f\u8fd9\u4e0d\u603b\u662f\u6700\u597d\u7684\u9009\u62e9<\/span>.<\/span>\u901a\u8fc7\u4e86\u89e3\u4f60\u7684\u54ea\u4e9b<\/span>T-SQL<\/span>\u8bed\u53e5\u53ef\u4ee5\u88ab\u53c2\u6570\u5316\u7136\u540e\u4f7f\u7528<\/span>sp_executesql<\/span>\u5b58\u50a8\u8fc7\u7a0b<\/span>,<\/span>\u4f60\u53ef\u4ee5\u5e2e\u52a9<\/span>SQL Server<\/span>\u8282\u7701\u8d44\u6e90\u5e76\u4f18\u5316\u4f60\u7684\u67e5\u8be2\u7684\u6027\u80fd<\/span>.<\/span><\/span><\/span><\/span><\/span><\/p>\n","protected":false},"excerpt":{"rendered":"

\u6211\u5c06\u8ba8\u8bba\u5982\u679c\u4e00\u4e2a\u67e5\u8be2\u53ef\u4ee5\u88ab\u53c2\u6570\u5316,\u90a3\u4e48SQL Server\u4f18\u5316\u5668\u600e\u6837\u5c1d\u8bd5\u5c06\u5176\u53c2\u6570\u5316,\u4ee5\u53ca\u4f60\u53ef\u4ee5\u600e\u6837\u5efa\u7acb\u4f60\u81ea\u5df1\u7684 […]<\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[17],"tags":[16],"class_list":["post-179","post","type-post","status-publish","format-standard","hentry","category-sqlserver","tag-sql_server_2008_r2"],"_links":{"self":[{"href":"http:\/\/www.royalwzy.com\/index.php?rest_route=\/wp\/v2\/posts\/179","targetHints":{"allow":["GET"]}}],"collection":[{"href":"http:\/\/www.royalwzy.com\/index.php?rest_route=\/wp\/v2\/posts"}],"about":[{"href":"http:\/\/www.royalwzy.com\/index.php?rest_route=\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"http:\/\/www.royalwzy.com\/index.php?rest_route=\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"http:\/\/www.royalwzy.com\/index.php?rest_route=%2Fwp%2Fv2%2Fcomments&post=179"}],"version-history":[{"count":0,"href":"http:\/\/www.royalwzy.com\/index.php?rest_route=\/wp\/v2\/posts\/179\/revisions"}],"wp:attachment":[{"href":"http:\/\/www.royalwzy.com\/index.php?rest_route=%2Fwp%2Fv2%2Fmedia&parent=179"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"http:\/\/www.royalwzy.com\/index.php?rest_route=%2Fwp%2Fv2%2Fcategories&post=179"},{"taxonomy":"post_tag","embeddable":true,"href":"http:\/\/www.royalwzy.com\/index.php?rest_route=%2Fwp%2Fv2%2Ftags&post=179"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}