ROWNUM is driving me nuts - queries suggested produced no results

From: MaryAnn Atkinson <maryann_30_at_yahoo.com>
Date: Wed, 09 Jul 2003 08:26:11 -0700
Message-ID: <F001.005C413E.20030709081924@fatcity.com>

I definitely dont fully understand ROWNUM yet, and you guys so far provided more info than a couple of books by Oracle, that I have here. For a second I thought I'm beginning to get it, but the queries suggested produced no results...

SQL> SELECT ROWNUM, GENDER
  2 FROM (SELECT ROWNUM, GENDER

  3          FROM   EMP2
  4          WHERE  ROWNUM <= 20)

  5 WHERE ROWNUM > 10; no rows selected

SQL> SELECT r, GENDER
  2 FROM (SELECT ROWNUM r, GENDER

  3          FROM   EMP2
  4          WHERE  ROWNUM <= 20)

  5 WHERE ROWNUM > 10; no rows selected

SQL> SELECT r "ROWNUM", GENDER
  2 FROM (SELECT ROWNUM r, GENDER

  3          FROM   EMP2
  4          WHERE  ROWNUM <= 20)

  5 WHERE ROWNUM > 10; no rows selected

SQL> ... so, any help is appreciated - rownum is driving me nuts...

thx
maa

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Author: MaryAnn Atkinson
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