how to update m to f and f to m at the same time in sql server 2005

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5.00/5 (1 vote)

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SQL-Server-2005

Hi,

Suppose I have a table structured as

XML

name     |   gender
 anthony       m
 micheal       m
 jane          f
 kim           f

Now suppose I want to change m to f and at the same time f to m how can
I do so. I want to replace m to f and f to m simultaneously. How can i do so?

The table structure I should get after executing the sql query should be like this after

VB

name     |   gender
 anthony       f
 micheal       f
 jane          m
 kim           m

Please help.

Posted 2-Dec-10 6:26am

software_Engi08

Updated 2-Dec-10 7:22am

Henry Minute

v3

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3 solutions

Solution 2

SQL

UPDATE [MyTable]
SET GENDER = CASE
                WHEN GENDER='M' THEN 'F'
                WHEN GENDER='F' THEN 'M'
                ELSE GENDER
             END

Posted 2-Dec-10 8:58am

Costica U

Comments

strogg 3-Dec-10 9:21am

My vote of 5. That was a better solution. Had never took a look at CASE statements :)

Solution 3

Costica U, thanks a lot. You have given my solution also. I was trying it from last one week... Again Thanks a lot.

Posted 1-Apr-12 9:13am

riteshsingh_jsr

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strogg · Accepted Answer · 2010-12-02T06:52:00

It'd be helpful if you had specified the data type of your 'Gender' field.

If you're using a Bit (assuming 0=male & 1=female OR 1=male & 0=female)
it's simpler - you can use this statement

Update Your_Table_Name SET Gender = ~ Gender

If you're using a string or any other data type, you can do it in multiple steps (I'll assume string here 'm' for male & 'f' for female)

STEP 1 - Temporarily change the 'm' to some other value (say 't')
Update Your_Table SET Gender = 't' where Gender = 'm'

STEP 2 - Change 'f' to 'm'
Update Your_Table SET Gender = 'm' where Gender = 'f'

STEP 3 - Change the temporarily renamed 'm' ('t') to 'f'
Update Your_Table SET Gender = 'f' where Gender = 't'