Comments on: Using a Case Statement in a SQL Where Clause

By: Dhiraj

Dhiraj — Thu, 23 Jun 2011 06:10:16 +0000

Your comment is awaiting moderation.

What if i want to change the condition
Why is some thing like below not possible?
where var1
case when comparer = ‘G’ then
= — change condition here
end
‘conditionvalue’

By: Dhiraj

Dhiraj — Thu, 23 Jun 2011 06:09:17 +0000

What if i want to change the condition
Why is some thing like below not possible?
where var1
case when comparer = ‘G’ then
<=
else
<=
end
'conditionvalue'

By: kralco626

kralco626 — Thu, 09 Jun 2011 11:49:41 +0000

Not sure its a Coincidence… :p

By: Loralei

Loralei — Fri, 25 Feb 2011 20:11:44 +0000

Thanks so much for this post! I read another one that said a case statment was not possible in a where clause, but I actually really had the need for it. So, now my query gets me exactly what I need.

By: Scott

Scott — Fri, 08 Jan 2010 10:17:52 +0000

that doesn’t look like you can use a case statement. just a huge if…ou just need a lot of parenthesis and all your “and””s should be “or”‘s since you cant have a record that has both status=pay and status=approval at the same time.

WHERE
((status = ‘pay’ and reason is null)
OR (status = ‘approval’ and reason is null))
AND
((status = ‘exception’ and reason is not null)
OR (status = ‘exception’ and reason1 is not null)
OR (status = ‘exception’ and reason2 is not null))

By: Val

Val — Wed, 06 Jan 2010 18:49:04 +0000

I’m trying to use Case in the where clause, but I’m new to SQL and am not sure if that will even work or how to make it work with what I desire.

What I desire is below…can anyone help?

Where
status = ‘pay’ and reason is null
and status = ‘approval’ reason is null
and status = ‘exception’ and reason is not null
and status = ‘exception’ and reason1 is not null
and status = ‘exception’ and reason2 is not null

By: Nits

Nits — Mon, 16 Nov 2009 14:04:13 +0000

Hi, Thank for the code, i really need this type of functionaliy, thanks again…!!!

By: Nateg

Nateg — Thu, 24 Sep 2009 22:09:17 +0000

Thanks for the post. Been trying to do some things with a similar situation at work and found this helpful.

Coincidentally, you can put a case statement on both sides of the = sign like so:

where
case (boolean) then (expression) else (expression) end =
case (boolean) then (expression) else (expression) end

As long as both sides of the operator have valid syntax.