Using CASE in a FROM clause to dynamically build query.

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Using CASE in a FROM clause to dynamically build query.

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AskSQLTeam
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Posted - 2006-09-25 : 07:28:57

John writes "I read your article about using Case to dynamically build a select statement within a stored procedure. Worked on the basic select, but fails sytax check when I try to apply a CASE to build an IN condition for filtering in the from clause. Syntax checker points to the 'CASE @StatementType' line. I says "Incorrect syntax near the word case".


select AcctPeriod, 
       MasterAcctNbr,
       Case @CombDiv  -- this works great, thanks!!!
         When 'C' then 0
         When 'D' then Divnbr
       End as DivNbr
          from pvw_GL_Totals_By_Acct
             where AcctType in 
                 Case @StatementType  --error occurs here
                   When 'BS' then ('A','L','C')
                   When 'PL' then ('E','R')
                 End

My goal is to pass two parameters to my procedure, @CombDiv and @StatementType, and dymically build the sql select from that. The resulting from clause would be either



   Where AcctType in ('A','L','C')
or
   Where AcctType in ('E','R')

Thanks,

John Farmer
Windows XPPro sp2
MSSQL 2000 (developer) sp4"

chiragkhabaria
Master Smack Fu Yak Hacker

1907 Posts

Posted - 2006-09-25 : 07:40:29


select AcctPeriod, 
       MasterAcctNbr,
       Case @CombDiv  -- this works great, thanks!!!
         When 'C' then 0
         When 'D' then Divnbr
       End as DivNbr
          from pvw_GL_Totals_By_Acct
             where (AcctType in ('A','L','C') And @StatementType = 
            'BS') or (AcctType in ('A','L','C') And @StatementType = 'PL')

Chirag

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