Re: sql question ???

A ZERO length varchar is treated as NULL

so your second query should be select count(*) from cli_clients where trim(client_company) is null
and cli_id in (257, 396, 727);

At 12:09 PM 3/6/2003 -0800, you wrote:
>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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