Well, the answer is pretty straight forward and that is what we are going to see in today’s video of One Scan for 3 Count Sum.
SQL Server – Single Scan for 3 Operations – COUNT(*) COUNT(1) SUM(1)
Today we will take the same conversation to the next level by discussing Single Scan for 3 Operations – COUNT(*) COUNT(1) SUM(1).
SUM(1) vs COUNT(1) Performance Battle – SQL in Sixty Seconds #177
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.
SQL SERVER – CONVERT Empty String To Null DateTime
Let us learn today how to CONVERT Empty String To Null DateTime. While I focus on SQL Server Performance Health Check, let us learn about it today.
SQL SERVER – Function to Calculate Simple Interest
It was very surprising that they would write a complicated function. Let us see a very simple way to write Function to Calculate Simple Interest.
SQL SERVER – Convert Date Time AT TIME ZONE
My client last week about Comprehensive Database Performance Health Check. The question was how to Convert Date Time AT TIME ZONE.
SQL SERVER – CHECK CONSTRAINT to Allow Only Digits in Column
My client during Comprehensive Database Performance Health Check. Today we will learn about CHECK CONSTRAINT to Allow Only Digits in Column.