RE: Selecting for Dummies

"ANSI SQL has table references (correlation names) scoped to just one level deep"

HTH,
T. J.

From: oracle-l-bounce_at_freelists.org [mailto:oracle-l-bounce_at_freelists.org] On Behalf Of Nabil Jamaleddin Sent: Tuesday, November 19, 2013 8:54 AM To: oracle-l_at_freelists.org
Subject: Selecting for Dummies

This works fine:

select (select b.dummy from dual b where b.dummy = a.dummy) from dual a;

But this does not...

select (select * from (select b.dummy from dual b where b.dummy = a.dummy)) from dual a;

ora-00904 a.dummy: invalid identifier

a.dummy seems to lose focus after getting nested twice. Is this normal? Using oracle 11.2.0.3 on Linux.

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