select * from tb whrer cast('2004-12-3' as datetime)=cast(cast(release_year as varchar)+'-'+cast(release_month as varchar)+'-'+cast(release_day as varchar) as datetime)
select * from tb whrer cast(cast(release_year as varchar)+'-'+cast(release_month as varchar)+'-'+cast(release_day as varchar) as datetime) < getdate()还不对哦,和当前日期怎么比较?
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