Hello
2012/4/6 Andreas <maps.on@gmx.net>:
> hi,
>
> is there a disadvantage to write a join as
>
> select *
> from a, b
> where a.id = b.a_id;
>
> over
>
> select *
> from a join b on a.id = b.a_id;
>
yes - newer notation has some advantages
* clean specification join predicate and filter predicate
* simple adaptability to outer join
* increased protection against copy/paste bug that introduce Cartesian product
Regards
Pavel Stehule
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