Algirdas,
This should do the trick:
SELECT a.id,b.name FROM a,b WHERE a.id=b.id UNION SELECT id,null FROM a WHERE id NOT IN (SELECT id FROM b);
Troy
>
> Hi all,
>
> I'm new to postgre, I've changed my work and consequently now i'm moving
> from MS plaform.
> In MS SQL there are such constructs left or right outer join, in postgres
> there are no such thing
>
> Can You offer me strategy to make query that selects from table (a) and
> joins to it another (b)
> on e.g. a.id=b.aid but joins so that in case there is no value in table b
> NULL is left in result:
> in MS SQL i've used query:
>
> select a.id, b.name from a left outer join b on a.id=b.aid
>
> table a table b
>
> id | aid | name
> ----------- ----------------
> 1 1 | Tom
> 2 3 | Sam
>
> result:
> a.id | b.name
> ---------------------
> 1 | Tom
> 2 | NULL
>
> thank you in advance
>
> Algirdas ©akmanas
> IT manager
> +370 99 90369
> asakmanas@grafton.lt
> Grafton Entertainment
> http://www.tvnet.lt
>
>
>
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