sql question ???

From: Andrea Oracle <andreaoracle_at_yahoo.com>
Date: Thu, 06 Mar 2003 12:09:32 -0800
Message-ID: <F001.005625C7.20030306120932@fatcity.com>

Hi, I got a SQL question (9i on Red Hat), commands shown below. The first sql returns 3 rows with value 1, so trim(client_company) = '', how come the 2nd sql doesn't return anything??

SQL> select decode(trim(client_company), '', 1, ' ', 2, null, 3, 4) from cli_clients where
cli_id in (257, 396, 727);

DECODE(TRIM(CLIENT_COMPANY),'',1,'',2,NULL,3,4)

---

                                              1
                                              1
                                              1

3 rows selected.

SQL> select count(*) from cli_clients where trim(client_company) = '' and cli_id in (257, 396, 727);

 COUNT(*)

---

        0

1 row selected.

---

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Author: Andrea Oracle
  INET: andreaoracle_at_yahoo.com

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