Dnia 2003-06-20 07:12, Użytkownik Együd Csaba napisał:
Hi All,
 here are my three tables. I wold like to list them in the following way: I
 need all the columns from t_stockchanges, and one field for the
productgroup
 the t_stockchanges.productid belongs to.

 But one product can belong to many groups, so i would need one row for each
 group for each product.

 My bad query is:
 ------------------------
 DB=# select t_stockchanges.productid, (select name from t_productgroups
 where id=(select productgroupid from t_prod_in_pgr where
 productid=t_stockchanges.productid)) as pgroup from t_stockchanges;
 ERROR:  More than one tuple returned by a subselect used as an expression.
 DB=#
 ---------------
 Yes, this is absolutelly true, but I would like postgres to give me all the
 tuples found. How can I ask him to do so?

 Thank you,
 -- Csaba

Sure, use "limit 1" in a subquery.

"limit" and "offset" are well described in Postgresql documentation.

Regards,
Tomasz Myrta




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