SQL: select @var = xxx from table1 problem
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declare @var int
set @var = 1
print '@var = ' + isnull(str(@var), 'null')
select top 1 @var = [object_id] from sys.objects where 1=2
-- @var != null
print '@var = ' + isnull(str(@var), 'null')
set @var = 1
print '@var = ' + isnull(str(@var), 'null')
select top 1 @var = [object_id] from sys.objects where 1=2
-- @var != null
print '@var = ' + isnull(str(@var), 'null')
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