Mike S. Nowostawsky wrote:
> How can one select only a certain number of records in Postgres?
>
> In other SQL langs we can use, say, for the first 20 recs:
>
> select * from tablename where rownum < 21;
>
> WHAT should 'rownum' be to make this select work... OR is there a diff
> syntax?
use the LIMIT clause, e.g.
SELECT * FROM tablename LIMIT 20
for the first 20 rows, or
SELECT * FROM tablename LIMIT 10,20
for 10 rows beginning from the 20th row (or possibly the other way round,
the caffeine isn't working yet ;-)
When using LIMIT it is generally advisable to also use ORDER BY in order to
guarantee consistent result sets over repeated queries.
HTH
Ian Barwick
--
Ian Barwick - Developer
http://www.akademie.de
Remove SUNGLASSES to reply ;-)
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