Zustand innerhalb case-Anweisung - SQL Server 2008

Question

Wie Bedingungen innerhalb Case-Anweisung verwenden:

select * from tbl 
     where case when expr then 
     (
     (x=@_megacity and state_group in (select * from temp_state_megacity)) OR 
     (x=@_10lac and state_group in (select * from temp_state_10lac)) OR 
     (x=@_below10 and state_group in (select * from temp_state_below10)) OR 
     (x=@_rural and state_group in (select * from temp_state_rural)) 
     ) else true end 

Fehler - falsche Syntax

Answer 1

In einer WHERE Klausel Sie AND verwenden, OR und NOT Ausdrücke zu kombinieren:

select * from tbl 
    where NOT <expression> OR 
    (
    (x=@_megacity and state_group in (select * from temp_state_megacity)) OR 
    (x=@_10lac and state_group in (select * from temp_state_10lac)) OR 
    (x=@_below10 and state_group in (select * from temp_state_below10)) OR 
    (x=@_rural and state_group in (select * from temp_state_rural)) 
    );