The TRUTH about Aggregate functions and NULL values!
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Do you understand SQL but still cannot write SQL queries correctly ?
Are you afraid to switch jobs because of the SQL interview rounds or have you failed SQL Interview earlier ?
If you are someone who understands SQL and need more confidence to solve SQL queries correctly, I would like to share my recent online course especially created for you.
In this video I have tested if aggregate functions like COUNT actually ignore the NULL values during calculation.
I have also shared 2 solutions to overcome it.
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