SQL Server Execution Times: CPU time = 460 ms, elapsed time = 470 ms. 如果可以收集查詢計劃,請檢查執行 計劃屬性中的數據。 使用[包含實際執行計劃] 執行查詢。 從[執行計劃] 選取最左邊的運算子。 從[屬性] 展開 [QueryTimeStats ] 屬性。 檢查ElapsedTime
In the other editions of SQL Server, however, the query must include the indexed view and specify the hint NOEXPAND to get the benefit of the index on the view. If your queries could benefit from having more than one index on the view, non-clustered indexes can also be created on the ...
SQL Server 阻止了对组件“Ad Hoc Distributed Queries”的 STATEMENT“OpenRowset/OpenDatasource”的访问,因为此组件已作为此服务器安全配置的一部分而被关闭。系统管理员可以通过使用 sp_configure 启用“Ad Hoc Distributed Queries”。有关启用“Ad Hoc Distributed Queries”的详细信息,请搜索 SQL Server 联机丛书中的...
您可以使用 SQL Server 分布式查询和 OPENDATASOURCE 或 OPENROWSET 函数临时查询很少访问的 Excel 数据源,如下所示: SELECT * FROM OPENDATASOURCE('Microsoft.Jet.OLEDB.4.0', 'Data Source=c:\book1.xls;Extended Properties=Excel 8.0')...Sheet1$
SQL Server Azure SQL 数据库 Azure Synapse Analytics Analytics Platform System (PDW) PolyBase 是 SQL Server 的数据虚拟化功能。 什么是 PolyBase? 借助PolyBase,SQL Server 实例可以直接从 SQL Server、Oracle、Teradata、MongoDB、Hadoop 群集、Cosmos DB 和 S3 兼容的对象存储使用 T-SQL 查询数据,而无需单独...
你有一个 Microsoft SQL Server 2017 实例,该实例具有链接到另一个 SQL Server 实例的服务器设置。 没有绕过遍历检查本地策略权限的用户在重新启动 SQL server 服务后,会运行第一个链接服务器查询。 在此方案中,将运行初始链接服务器查询,并且任何用户连续链接服务器查询都将返回类似于以下内容的...
real-time graphs. It also lists currently running processes, resource waits, data file I/O, and recent expensive queries. In this article, we will focus on the recent expensive queries. You can find more information about other Activity Monitor features in this article:SQL Server ...
配置服务器选项启用AdHocDistributedQueries重新启动SQLServer服务 2.1 配置服务器选项 首先,我们需要配置SQL Server实例的服务器选项,以允许使用Ad Hoc Distributed Queries组件。使用以下代码更改服务器选项: sp_configure'show advanced options',1;RECONFIGURE;
The potential exists to integrate the model within the SQL Server database engine and make it seamless to the user. As a user, you would use basic syntax to create a new kind of index and leave your queries unchanged. The rest of the responsibility would be SQL Server's—your queries wo...
SQL Server Azure SQL Database Azure SQL Managed Instance Azure Synapse Analytics SQL database in Microsoft Fabric The Query Optimizer uses statistics to create query plans that improve query performance. For most queries, the Query Optimizer already generates the necessary statistics for a high-quality...