SQL Switch/Case in ‘where’ clause

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I tried searching around, but I couldn’t find anything that would help me out.

I’m trying to do this in SQL:

declare @locationType varchar(50);
declare @locationID int;

SELECT column1, column2
FROM viewWhatever
WHERE
CASE @locationType
    WHEN 'location' THEN account_location = @locationID
    WHEN 'area' THEN xxx_location_area = @locationID
    WHEN 'division' THEN xxx_location_division = @locationID

I know that I shouldn’t have to put ‘= @locationID’ at the end of each one, but I can’t get the syntax even close to being correct. SQL keeps complaining about my ‘=’ on the first WHEN line…

How can I do this?


Solution

declare @locationType varchar(50);
declare @locationID int;

SELECT column1, column2
FROM viewWhatever
WHERE
@locationID = 
  CASE @locationType
      WHEN 'location' THEN account_location
      WHEN 'area' THEN xxx_location_area 
      WHEN 'division' THEN xxx_location_division 
  END

Source: StackOverflow.com

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