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Message Posted: Mon, 24 Oct 2005 @ 15:29:17 GMT

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There is no implied DISTINCT.

The reason why query 1 has spool error and not query 2 is - The 2 queries are different, and can give you different results, if the derived table query has complete row dups.

I bet

     select col3, col4 from table2

gives you many, many complete row dups. And if you did increase spool and let query 1 run, you will get large output that you did not intend to get.

Looks like you already found that query 2 is what you really want.

Kumaran Anantaraman

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