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$
2301 Enable advanced decision support optimizations that are specific to decision support queries. This option applies to decision support processing of large data sets.Scope: Global or session or query (QUERYTRACEON). 2312 Sets the Query Optimizer cardinality estimation model to SQL Server 2014 (1...
Examples of running (CPU-bound) queries: Elapsed Time (ms)CPU Time (ms)Reads (logical) 32003000300000 1080100020 Logical reads - reading data/index pages in cache - are most frequently the drivers of CPU utilization in SQL Server. There could be scenarios where CPU use comes from other source...
DECLARE@init_sum_cpu_timeint, @utilizedCpuCountint--get CPU count used by SQL ServerSELECT@utilizedCpuCount =COUNT( * )FROMsys.dm_os_schedulersWHEREstatus='VISIBLE ONLINE'--calculate the CPU usage by queries OVER a 5 sec intervalSELECT@init_sum_cpu_time =SUM(cpu_time)FROMsys.dm_exec_...
SQL Server is configured to use a local account.*/ select * from openrowset('MSDASQL', 'DSN=Visual FoxPro Database; SourceDB=e:\VFP98\data\Testdata.dbc; SourceType=DBC', 'select * from customer where country != "USA" order by country' go /* sp_addlinkedserver examples */ ...
SQL Server Native Client Native Client OLE DB Native Client ODBC General How-to SQL ODBC APIs for Native Clients Driver Extensions - Bulk Copy Functions Performing Bulk Copy Operations ODBC Communication Queries Queries Executing Statements Batches of Statements ...
导读本文为解决SQL关联子查询问题,提出了Apply算子,用于描述SQL子查询,并给出了Apply算子向join转换的恒等式,基于这些恒等式,可以实现SQL子查询去关联。Apply算子已经应用到SQL Server7.0。 1.Apply算子Apply…
Before SQL Server 2022 (16.x), AGs only provide database-level, and not instance-level protection. Anything not captured in the transaction log or configured in the database will need to be manually synchronized for each secondary replica. Some examples of objects that must be synchronized manu...
下面的示例启用Ad Hoc Distributed Queries,然后使用OPENROWSET函数查询名为Seattle1的服务器。 SQL USEmaster; GOEXECUTEsp_configure'show advanced options',1; GO RECONFIGURE; GOEXECUTEsp_configure'Ad Hoc Distributed Queries',1; GO RECONFIGURE; GOSELECTa.*FROMOPENROWSET ('MSOLEDBSQL','Server=Seattle1;Trus...
Examples show how to handle existing indexes and also the name of the index when performing this conversion. Create a nonclustered columnstore index on a rowstore table. CREATE COLUMNSTORE INDEX (Transact-SQL) A rowstore table can have one nonclustered columnstore index. Beginning with SQL Server ...