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Posted 24 Nov 2010

COUNT of DISTINCT Rows in SQL Server

, 26 Nov 2010
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COUNT of DISTINCT Rows in SQL Server
SQL Server does not support COUNT(DISTINCT *). For example, the below query fails.


The error message generated is:

Incorrect syntax near '*'

Instead, use the below query:


Note: This is specifically useful when you want 'DISTINCT *' - without coloumn name(s)


This article, along with any associated source code and files, is licensed under The Code Project Open License (CPOL)


About the Author

India India
Ravikiran Malladi is a senior software professional in Microsoft technologies. He has global IT experience of over 10 years and has compulsive habit of writing tools, particularly for the projects he works on. He has vast experience in the roles of senior developer, technical analyst, technical architect besides in technical lead roles.

His hobbies include chess, music, cricket, web sites along side writing technical articles and technical blogs.

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Comments and Discussions

GeneralMy vote of 1 Pin
kimberly wind21-Feb-13 18:52
memberkimberly wind21-Feb-13 18:52 
GeneralReason for my vote of 5 It works for DISTINCT but also work ... Pin
Simon Dufour1-Dec-10 4:17
memberSimon Dufour1-Dec-10 4:17 
Reason for my vote of 5
It works for DISTINCT but also work for any kind of subselect. If you wanted to count all the employees living in a city, you'd only have a small edit to make here. Good tip.
GeneralReason for my vote of 3 gud 1 Pin
ravindra_dhakate@rediffmail.com29-Nov-10 4:39
memberravindra_dhakate@rediffmail.com29-Nov-10 4:39 
GeneralReason for my vote of 5 Good Tip. Pin
Hiren Solanki29-Nov-10 3:00
memberHiren Solanki29-Nov-10 3:00 

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