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parallel operations

SQL SERVER – Number of Rows Read Per Threads in Parallel Operations

July 26, 2019
Pinal Dave
SQL Tips and Tricks
Execution Plan, Parallel, SQL CPU, SQL DMV, SQL Scripts, SQL Server, SQL Server Management Studio, SSMS

Question received via email: The question was about is there any way to know how many rows each thread execute in parallel operations.

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query specific wait statistics

SQL SERVER – Query Specific Wait Statistics and Performance Tuning

July 25, 2019
Pinal Dave
SQL Performance
Resource Governor, SQL Memory, SQL Server, SQL Server Management Studio, SQL Wait Stats, SSMS

After a quick research we figured out the issue was with memory requirement for their query and we used to query specific wait statistics.

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unique index

SQL SERVER – Performance Impact of Unique Index

July 24, 2019
Pinal Dave
SQL Performance
SQL Index, SQL Scripts, SQL Server, SSMS

In the latest Comprehensive Database Performance Health Check engagement, we had a very interesting situation of Performance Impact of Unique Index.

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dynamic

SQL SERVER – Dynamic SQL and Temporary Tables

July 22, 2019
Pinal Dave
SQL Tips and Tricks
Dynamic SQL, SQL Scripts, SQL Server, SQL TempDB, SSMS, Temp Table

Earlier on this blog I received following follow up question about Dynamic SQL and Temporary Tables. Let us understand a bit more in detail.

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Global Temporary Tables

SQL SERVER – Dynamic SQL and Global Temporary Tables

July 20, 2019
Pinal Dave
SQL Tips and Tricks
Dynamic SQL, SQL Scripts, SQL Server, SQL TempDB, SSMS, Temp Table

During the recent work of Comprehensive Database Performance Health Check, we had a very interesting situation of Dynamic SQL and Global Temporary Tables.

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upgrade error

SQL SERVER – Upgrade Error: The Server Principal is Not Able to Access the Database “msdb” Under the Current Security Context

July 19, 2019
Pinal Dave
SQL
SQL Error Messages, SQL Scripts, SQL Server, SQL Server Security, SQL Upgrade, System Database

The Upgrade Error messages shown in ERRORLOG was “The server principal “SQLAuthority\AuthOwner” is not able to access the database “msdb”

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backslash

SQL SERVER – SQL Agent Job and Backslash – Strange Behavior

July 18, 2019
Pinal Dave
SQL Puzzle
SQL Jobs, SQL Scripts, SQL Server, SQL Server Agent, SQL Stored Procedure

Today’s blog post is about SQL Agent Job and Backslash. I was surprised to see this behavior. Here are the steps to reproduce this behavior.

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