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Index Frequently Asked Questions

COUNT(*) and Index Frequently Asked Questions

June 22, 2021
Pinal Dave
SQL Tips and Tricks
SQL Index, SQL Scripts, SQL Server

However, before you read today’s COUNT(*) and Index Frequently Asked Questions I suggest you watch the video COUNT(*) and Index.

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StarIndex

COUNT(*) and Index – SQL in Sixty Seconds #175

June 21, 2021
Pinal Dave
SQL Video
Execution Plan, SQL in Sixty Seconds, SQL Index, SQL Scripts, SQL Server

Earlier I wrote two blog post on the topic of COUNT(*) and Index and today I have to build a video on that topic as many of you really wanted.

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index used

SQL SERVER – COUNT(*) and Index Used – Part 2

June 18, 2021
Pinal Dave
SQL Tips and Tricks
Clustered Index, Execution Plan, SQL Index, SQL Scripts, SQL Server

Yesterday I wrote a blog post on the topic SQL SERVER – COUNT(*) and Index Used, lots of people asked me to follow up question.

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Count Distinct Values

MS Access – Count Distinct Values

June 17, 2021
Pinal Dave
SQL Tips and Tricks
MS Access, SQL Distinct, SQL Scripts, SQL Server

I love answering random questions and particularly when they are from my paying clients. Let me answer about MS Access and Count Distinct Values.

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Difficult to Remove

SQL SERVER – Identity Column is Difficult to Remove

June 16, 2021
Pinal Dave
SQL Tips and Tricks
SQL Identity, SQL Scripts, SQL Server

I discuss this during  Comprehensive Database Performance Health Check. It is true that the identity Column is Difficult to Remove.

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COUNT

SQL SERVER – COUNT(*) and Index Used

June 15, 2021
Pinal Dave
SQL Performance
Clustered Index, Execution Plan, SQL Index, SQL Scripts, SQL Server

DBA suspects those operations are using lots of clustered index scans. Let us discuss today COUNT(*) and Index Used. Let’s learn.

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good or bad

Index Scans – Good or Bad? – SQL in Sixty Seconds #174

June 14, 2021
Pinal Dave
SQL Video
Execution Plan, SQL in Sixty Seconds, SQL Index, SQL Scripts, SQL Server

Index Scans – Good or Bad? Lots of people ask about this question and I have built a blog post on the topic – SQL SERVER – Index Scans are Not Always Bad.

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