Technical Article

Find Top 5 executed queries ordered by execution count

I wrote this query that helps us find executed queries with most number of execution counts. The DMV that we have used in this script is sys.dm_exec_query_stats and the function that we have used is sys.dm_exec_sql_text.

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2015-03-04 (first published: )

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Technical Article

Primary Keys which are not Clustered Indexes in a database

Recently I was asked to find all the Primary keys that are not clustered Indexes in the database. I constructed the below script which will help us to locate the primary keys in the database which are not clustered index.

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2013-09-18 (first published: )

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Question of the Day

Locking Hierarchies

You have a table [dbo].[orders] without a Clustered Index (Heap). The table does not have any other nonclustered indexes! You rund the following command in Read Committed Isolation Level:

SELECTo_orderdate,
        o_orderkey,
        o_custkey,
        o_storekey
FROMdbo.orders
WHEREo_orderkey = 3877;

What locking hierarchy will Microsoft SQL Server use?

 

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