Raul Undreiner (2/27/2013)
What am I missing?Why would this work
SELECT *
FROM #MainQuery
WHERE column1 IN ('Value1','Value2')
and this not?
declare @Var varchar(100)
set @TOB = '''Value1'',''Value2'''
SELECT *
FROM #MainQuery
WHERE column1 IN (@Var)
-- because this
declare @Var varchar(100)
set @TOB = '''Value1'',''Value2'''
SELECT *
FROM #MainQuery
WHERE column1 IN (@Var)
-- is the same as this
SELECT *
FROM #MainQuery
WHERE column1 IN ('Value1,Value2')
-- which has only one value in the list
-- and may not have a match in column1
For fast, accurate and documented assistance in answering your questions, please read this article.
Understanding and using APPLY, (I) and (II) Paul White
Hidden RBAR: Triangular Joins / The "Numbers" or "Tally" Table: What it is and how it replaces a loop Jeff Moden