how to write single query chage data

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i created one table with cols name and gender. i inseted values.now i want inerchange values in gender col as M=F,F=M

id gender
1 M
2 F
3 M
4 F
5 M
6 F

AFTER CHANGE OUT PUT USE SINGLE QUERY
id gender
1 F
2 M
3 F
4 M
5 F
6 M

Posted 5-Oct-11 21:55pm

udaipal

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André Kraak 6-Oct-11 4:05am

Repost of: http://www.codeproject.com/Questions/264735/how-to-write-single-query-chage-data
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Manfred Rudolf Bihy · Answer 1 · 2011-10-05T22:40:00

You can use the CASE WHEN construct to do the same: http://msdn.microsoft.com/en-us/library/ms181765(v=SQL.90).aspx[^].

An example:

SQL

UPDATE dbo.GenderTable
SET gender = CASE
                 WHEN 'F' THEN 'M'
                 WHEN 'M' THEN 'F'
             END

This works for SQL-Server 2005 & 2008.

Regards,

—MRB