>>No. INNER JOIN would select more than 1 record, in case of one-to-many. And forget about EXISTS for now. I am just trying to see why IN does not need the T1.PK_FLD = T2.PK_FLD in the subquery. For example, I used in my example columns that have the same name but there could be a case where columns have different names. For example:
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>>select * from Table1 T! where COL1 in (select COL2 from Table2 T2 where COL3='123')
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>>Would in the above case you still not use the T1.PK_FLD = T2.PK_FLD?
>
>I never would use T1.PK_FLD = T2.PK_FLD if I'm using IN subquery. The syntax of IN subquery doesn't ask for this and by trying to put it where you somehow complicate the whole process.
I will think about it.
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