How to merge two rows in same table in sql server?

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I have data in the following format in sql server 2008

userid   testid   catid    correct      incorrect
2         1        1       18           NULL
2         1        2        1           NULL
2         1        1       NULL          5
2         1        2       NULL           1

i have to make it into the following format:

userid   testid   catid    correct      incorrect
2         1        1       18           5
2         1        2        1           1

please help me to solve the problem.

Posted 21-Aug-13 2:44am

viky.singh

Updated 21-Aug-13 3:02am

Maciej Los

v2

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thanh_bkhn · Accepted Answer · 2013-08-21T03:27:00

Solution 1

You may try this:

SQL

SELECT userid, testid, catid, max(correct), max(incorrect)
FROM [your table]
GROUP BY userid, testid, catid

Posted 21-Aug-13 3:27am

thanh_bkhn

Comments

Maciej Los 21-Aug-13 9:59am

+5!

viky.singh 22-Aug-13 5:23am

thanks buddy it works fine.

thanh_bkhn 22-Aug-13 5:27am

Thanks Maciej

viky.singh 22-Aug-13 6:46am

thanks buddy your solutions works fine..