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sum

SUM(1) vs COUNT(1) Performance Battle – SQL in Sixty Seconds #177

June 29, 2021
Pinal Dave
SQL Video
Execution Plan, SQL Function, SQL in Sixty Seconds, SQL Scripts, SQL Server

Based on my recent two videos, I got lots of questions about SUM(1) vs COUNT(1) Performance Battle. Let us see that in today’s video.

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Performance Observation

SQL SERVER – SUM(1) vs COUNT(*) – Performance Observation

June 25, 2021
Pinal Dave
SQL Performance
Execution Plan, SQL Scripts, SQL Server

One question that kept on coming up was SUM(1) vs COUNT(*) – Performance Observation. Well, let us see that today.

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Collection of Articles

SQL SERVER – COUNT(*) Collection of Articles

June 24, 2021
Pinal Dave
SQL Performance
Execution Plan, SQL Server

Today we are building a Collection of Articles that have recently generated interest on the blog as well as on the YouTube channel –  SQL in Sixty Seconds. 

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Battle

COUNT(*) and COUNT(1): Performance Battle – SQL in Sixty Seconds #176

June 23, 2021
Pinal Dave
SQL Video
Execution Plan, SQL in Sixty Seconds, SQL Scripts, SQL Server

COUNT(*) and COUNT(1): Performance Battle – which one is better for performance? I got this question after watching my previous video.

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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

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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