Your Query...

Hi

You may have already got a solution. But the most straightforward soln.
would
be :-

SELECT    substr(a,1,instr(a,'_')-1)
FROM ....

< From first field to the filed before the first appearance of '_'>

Pl. confirm whether this works.

Bye

S.S.Mani
**************************************************************

RE: [SQL] substring


    From: Michael J Davis <michael.j.davis@tvguide.com>    To: "'Nuchanard Chiannilkulchai'" <nuch@valigene.com>,
pgsql-sql@hub.org    Subject: RE: [SQL] substring    Date: Mon, 26 Apr 1999 14:35:16 -0500



try:

select a, substring(a, 1, position('_' in a) -1) from table_a;

I have not tested this.  Not sure if the parameters to substring are
correct.  Also not sure if the -1 is needed.

> -----Original Message-----
> From: Nuchanard Chiannilkulchai [SMTP:nuch@valigene.com]
> Sent: Monday, April 26, 1999 8:57 AM
> To:   pgsql-sql@hub.org
> Subject:      [SQL] substring
>
> Hello,
>
>     How should I do my query to put a substring value in a field, in
> postgres ( I have 6.4) ?
>
> I have  in table table_a
> a
> ----------------
> 98-004_c136
> P124_154
> 98-005_c171
>
> and i want to select only the text before the underscore:
>
> in sybase, this should be
>  select a, substring(a,1,charindex('_',a)-1)  from table_a
>  a
>  ---------------- ----------------
>  98-004_c136      98-004
>  98-005_c171      98-005
>  P124_154         P124
>
>     Thanks a lot,
>     Nuch
>