Click here to Skip to main content
Click here to Skip to main content
Alternative Tip

Tagged as

Go to top

COUNT of DISTINCT Rows in SQL Server

, 26 Nov 2010
Rate this:
Please Sign up or sign in to vote.
Nice tip :)But if you have any column say empid which have the unique constraint then it is better to use the following SQL queryselect count(distinct empid ) from employees

Nice tip Smile | :)

But if you have any column say empid which have the unique constraint then it is better to use the following SQL query

select count(distinct empid ) from employees

License

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

Share

About the Author

Vivek Johari
Technical Lead
India India
I am currently working as a Analyst and have around 7.5 years of experience in database.
 
Degree:-
Master Degree in Computer(MCA)
 
Work experience:-
Designing of the database.
Database Optimization.
Writing Complex Stored Procedures,Functions,Triggers etc.
Designing and developing SSIS & DTS packages.
Designing SQL Reports using SSRS.
Database Server Maintenance.
 
Certification:-
Microsoft certified Sql DBA in Sql server 2008 (MCTS).
Microsoft certified BI professional in Sql server 2008 (MCTS).
Oracle certified profession DBA in ORACLE 10g (OCP)
certified profession DBA in ORACLE 9i (OCP)
 
My other publication
Technical Blog:- Technologies with Vivek Johari
 
Moderator and Blogger at BeyondRelational.com
 
Guest Author and Blogger at sqlservercentral.com
Follow on   Twitter   Google+   LinkedIn

Comments and Discussions

 
GeneralReason for my vote of 1 Might work, who knows. It's not clea... PinmemberSimon Dufour1-Dec-10 3:16 
GeneralReason for my vote of 3 gud 1 Pinmemberravindra_dhakate@rediffmail.com29-Nov-10 3:39 
GeneralYes, for specific column(s) list, DISTINCT works, but for '*... Pinmembermravikiran27-Nov-10 12:09 
Yes, for specific column(s) list, DISTINCT works, but for '*' we dont have that luxury.

General General    News News    Suggestion Suggestion    Question Question    Bug Bug    Answer Answer    Joke Joke    Rant Rant    Admin Admin   

Use Ctrl+Left/Right to switch messages, Ctrl+Up/Down to switch threads, Ctrl+Shift+Left/Right to switch pages.

| Advertise | Privacy | Mobile
Web03 | 2.8.140916.1 | Last Updated 26 Nov 2010
Article Copyright 2010 by Vivek Johari
Everything else Copyright © CodeProject, 1999-2014
Terms of Service
Layout: fixed | fluid