Re: How to force select to return exactly one row - Mailing list pgsql-general

Brett Mc Bride <brett.mcbride@deakin.edu.au> wrote:

> How about:
> SELECT * from (
> SELECT somecolumns
>  FROM ko
> LEFT JOIN t1 ON t1.primarykey= ko.t1foreignkwey
> ...
> LEFT JOIN tn ON tn.primarykey= ko.tnforeignkwey
> WHERE ko.primarykey='someprimarykeyvalue'
> UNION ALL
> SELECT default_value
> )
> LIMIT 1;
> [...]

... with a proper "ORDER BY" clause.

Tim