| From: | Rob Sargent <robjsargent(at)gmail(dot)com> |
|---|---|
| To: | pgsql-sql(at)postgresql(dot)org |
| Subject: | Re: syntax of joins |
| Date: | 2012-04-06 19:28:08 |
| Message-ID: | 4F7F43C8.4010204@gmail.com |
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| Lists: | pgsql-sql |
On 04/06/2012 01:23 PM, Pavel Stehule wrote:
> Hello
>
> 2012/4/6 Andreas<maps(dot)on(at)gmx(dot)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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>
In other words, no disadvantage :)
-some cranky old guy who still misses "retrieve"
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