Referencing An Alias In A Where Clause

Jun 1, 2007

I have the following data set - there is more to it than whats below, I just made it easier to read and highlight my problem!



SELECT LEFT(actv.ProjID, 4) AS proj, actv.Activity, actv.TotalExpensesLB, actv.PADM
FROM dbo.xtbl_MERActv actv
WHERE LEFT(actv.projID,4) = @project OR actv.PADM = @PADM



What I want to do is have the user enter a 4 digit number (@project) which will correspond to LEFT(actv.ProjID, 4). The way it is now, if the user enters a 4 digit number, no records are returned. If the user enters a 6 digit number ( the real length of the projID), then it runs correctly and I get the records I want.



I have tried to use the alias 'proj' in the where statement, but I get an error message that it is an invalid column name.



Where am I going wrong?



Thanks in advance!

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