the above chart is still a very theoretic figure. Four times as many logical reads does not automatically mean four times as slow. In all reality you’ll have a large part of the clustered index in the cache—at
I want to know whether this will slow down,insert and update on the ? View 2 Replies View Related Simple Query Chooses Clustered Index Scan Instead Of Clustered Index Seek Nov 14, 2006 the query:SELECT a.AssetGuid, a.Name, a.LocationGuidFROM Asset a WHERE a.AssociationGui...
Or, assume that you have a non-clustered index on a clustered columnstore index, and Snapshot Isolation level is used. When you execute a query that retrieves data by using non-clustered index seek together with clustered columnstore...
Even on predominately batch-oriented tables, if the row width is excessive and a lot of the columns are never used for reporting, the use of a clustered index to satisfy common query criteria to support range scans may (and frequently does) slow things down a fair bit because it has to...
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UPDATE dbo.TABLE1 SET col2=1 where col2=1, to highlight why we see the locking that we are seeing. For the scenario with the clustered unique index we see the optimizer chose to do anindex seekhence it only locked the records that it was updating allowing other processes to update...
Or, assume that you have a non-clustered index on a clustered columnstore index, and Snapshot Isolation level is used. When you execute a query that retrieves data by using non-clustered index seek together with clustered columnstore...
IN clause extremely slow In Clause in Stored Procedure IN CLAUSE not working In SQL can we pass optional parameter to the function In T-SQL, Want to replace , (Comma) with ',' (Single quote & Comma). It is throwing Error In WHICH year where the MOST NUMBER of programmer born? IN,...