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Home/ Questions/Q 8733053
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Editorial Team
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Editorial Team
Asked: June 13, 20262026-06-13T09:33:58+00:00 2026-06-13T09:33:58+00:00

I want to filter by @campId if not null, or return all if null

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I want to filter by @campId if not null, or return all if null

This compiles but does not work as intended:

 declare @campId int
 select * 
 from cli 
 where 
    cu in (
        CASE @campId 
          when null then (select id from [dbo].[camp]) 
          else @campId 
        end) 
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  1. Editorial Team
    Editorial Team
    2026-06-13T09:33:59+00:00Added an answer on June 13, 2026 at 9:33 am

    if cu is never null

    where cu = isnull(@campid, cu)
    
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