Client vs. server evaluation Tracking vs. no-tracking Load related data Split queries Complex query operators Pagination SQL queries Database functions User-defined function mapping Global query filters Query tags Comparisons with null values in queries ...
Machine Learning Services (in database) Queries, stored procedures, views, functions, triggers (T-SQL) Replication, Change Tracking, Change Data Capture Startup, shutdown, restart issues (instance or database) SQL Server resource usage (CPU, Memory, Storage) and Configuration Slow query performanc...
FIX: "Non-yielding Resource Monitor" when you run a workload that executes concurrent queries in SQL Server 2012. This issue occurs when the concurrent queries are run against tables that contain clustered columnstore indexes.
On SQL Server, a trailing query-level hint (for example,OPTION (HASH JOIN)) On SQL Server, anORDER BYclause that isn't used withOFFSET 0ORTOP 100 PERCENTin theSELECTclause SQL Server doesn't allow composing over stored procedure calls, so any attempt to apply additional query operators to...
On SQL Server, an ORDER BY clause that isn't used with OFFSET 0 OR TOP 100 PERCENT in the SELECT clauseSQL Server doesn't allow composing over stored procedure calls, so any attempt to apply additional query operators to such a call will result in invalid SQL. Use AsEnumerable or AsAsyn...
导读 1.Apply算子 2. Parameterization in query execution 2.1 深层相关性(deep correlation) 3.子查询的关系代数表示 4.典型形式 4.1 GroupBy 4.2 评估groupby与join的order 5.相关子查询去相关性 6.结论 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...
Find out how to enable Ad Hoc Distributed Queries in SQL Server. You can then use OPENROWSET and OPENDATASOURCE to connect to remote OLE DB data sources.
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 sources: a while loop (in T-SQL or other code like XProcs or SQL CRL objects). The second example in the table...
Find out how to enable Ad Hoc Distributed Queries in SQL Server. You can then use OPENROWSET and OPENDATASOURCE to connect to remote OLE DB data sources.
Views are a virtual table defining a query against one or more tables. Data isn’t stored in the database and the result set is determined while the view is executed.What’s an Indexed View?An indexed view has a unique clustered index. The clustered index is stored in SQL Server and ...