RE: [SQL] substring

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(at)valigene(dot)com]
> Sent: Monday, April 26, 1999 8:57 AM
> To: pgsql-sql(at)hub(dot)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
>
>
>