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Use Subquery in the Delete Statement

user8794108Mar 2 2015 — edited Mar 4 2015

Hi, can anybody explain to me how is that letter D do the work ? I know you can use Subquery in the Detele Statement, but in this case the subquery is a SELECT * FROM two table ... how is that oracle knows that have to delete only the row in the order_items and not in orders table ?

Subquery_Delete.png

Thank !!!
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Locked on Apr 1 2015
Added on Mar 2 2015
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