SELECT case - SQL Server Forums

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SELECT case

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Topic

siumui
Yak Posting Veteran

54 Posts

Posted - 2012-04-27 : 10:19:18

Hello all,

Codes:

SELECT Account,
CASE WHEN mailed_date IS NOT NULL THEN DATEDIFF(dd, received_date, mailed_date)
CASE WHEN payment_date IS NOT NULL THEN DATEDIFF(dd, received_date, payment_date)
ELSE NULL END AS 'Days'
FROM my_table

My question is when the condition is met for the first WHEN CASE, does it continues with the 2nd CASE WHEN or not?

Your help is greatly appreciated. Thank you.

robvolk
Most Valuable Yak

15732 Posts

Posted - 2012-04-27 : 10:25:50

No, CASE evaluation stops at the first condition that's true.

siumui
Yak Posting Veteran

54 Posts

Posted - 2012-04-27 : 11:21:04

quote:
Originally posted by robvolk

No, CASE evaluation stops at the first condition that's true.

Thank you.

visakh16
Very Important crosS Applying yaK Herder

52326 Posts

Posted - 2012-04-27 : 15:16:18

actually your case statement can be simplied as


SELECT Account,
DATEDIFF(dd, received_date, COALESCE(mailed_date,payment_date)) AS 'Days'
FROM my_table

------------------------------------------------------------------------------------------------------
SQL Server MVP
http://visakhm.blogspot.com/

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