tuning sql server recursive queryWayne Bartkowski 676 Reputation points Nov 2, 2022, 10:18 AM I have a query that looks for the created and completed dates for outages that have overlapping times so it returns the minutes from the start to the last completed time in the group. Below image...
4 thoughts on “Recursive CTE – Sql Server” Pingback: Introduction to Common Table Expression (a.k.a CTE) in Sql Server | SqlHints.com Pingback: Multiple CTEs in a Single Query – Sql Server | SqlHints.com Pingback: Nested Common Table Expressions (i.e. CTE) – Sql Server | ...
Copy CodeUSEAdventureWorks2008R2;GOSELECT*FROMSales.CustomerAScINNERJOINSales.vStoreWithAddressesASsaONc.CustomerID=sa.BusinessEntityIDWHERETerritoryID=5OPTION(MERGEJOIN);GOB. Using OPTIMIZEFORThe following example instructs the query optimizertousethe value'Seattle'forlocal variable@city_nameandtousestatist...
1如果通过数据库范围的配置、跟踪标志或其他查询提示(例如QUERYTRACEON)强制设置,提示QUERY_OPTIMIZER_COMPATIBILITY_LEVEL_n不会替代默认或旧基数估计设置。 此提示仅影响查询优化器的行为。 它不会影响可能依赖于数据库兼容性级别的SQL Server 的其他功能,例如某些数据库功能的可用性。 有关详细信息,请参阅开发人员的...
Note: Client requests & sql events in SQL server post explain parameterised batch requests. The example shows how exactly the same query can behave differently depending on the database collation. If the DB uses the default SQL collation, not the one recommended by Microsoft for OS locale “Eng...
Microsoft removed this handy little procedure called sp_executeresultset from SQL Server in SQL Server 2005. It allows you to generate dynamic SQL code on the fly by using a SELECT query. Then, the resulting SQL commands will be executed against the database. It permits you to create a sin...
If the results aren't in the specified order, SQL Server generates an error message when the query is executed. If an ORDER clause is specified, the output of the table-valued function must be sorted according to the collation of the column (explicit or implicit). For example, if the ...
表示可以具有子选项列表的单个 ALTER SERVER CONFIGURATION SET EXTERNAL AUTHENTICATION 顶级设置。 AlterServerConfigurationExternalAuthenticationOption 表示单个 ALTER SERVER CONFIGURATION SET EXTERNAL AUTHENTICATION 选项。 AlterServerConfigurationFailoverClusterPropertyOption 表示单个 ALTER SERVER CONFIGURATION SET FAILOVE...
ROLLUP试了下雀氏行 (●'◡'●)数据库是SQL SERVER领导写的。
SQL Server 对数据库中的所有查询进行参数化。 可通过查看 is_parameterization_forced 目录视图中的 列确定此选项的当前设置。 < > query_store_options ::= 适用对象:SQL Server(从 SQL Server 2016 (13.x) 开始) ON |OFF [ ( 强制 ) ] |CLEAR [ ALL...