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Home > Forums > Programmers > DBMS Packages > Microsoft SQL Server: Programming Forum

How to handle missing dataHelpful Member! 

thread183-1687358
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wbodger (Programmer)
3 Jul 12 10:45
I have a function with the following query that may or may not have any records, but I need to return a value regardless

CODE

with optoutcte AS
(
SELECT *, ROW_NUMBER() OVER (ORDER BY OptOutDate DESC) AS Ordered
FROM tblSiteTaskOptOuts
WHERE SiteID=siteid
and TypeID=1
)
select ISNULL(OptOut,0) AS Status 
from optoutcte where Ordered=1

I was hoping that the ISNULL would work when there were no records in the CTE, but no luck. Any thoughts? I will be passing in a SiteID and there may not be any records. OptOut is a bit type field, so it can be 0 or 1. If there is no record, I want it to return a 0. Help?

wb
Helpful Member!  bborissov (Programmer)
3 Jul 12 11:05

CODE

IF NOT EXISTS(SELECT * FROM tblSiteTaskOptOuts WHERE SiteID=siteid and TypeID=1)
   SELECT CAST(0 AS bit) AS Status
ELSE
   SELECT OptOut
          FROM (SELECT OptOut, ROW_NUMBER() OVER (ORDER BY OptOutDate DESC) AS Ordered
                      FROM tblSiteTaskOptOuts
                WHERE SiteID=siteid
                  and TypeID=1) Tbl1
   WHERE Ordered = 1

Borislav Borissov
VFP9 SP2, SQL Server

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