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Posted by DA Morgan on 06/04/05 23:20
Erland Sommarskog wrote:
>>Except that you might try learning ANSI join syntax.
>
>
> Here I don't agree with Daniel, and I will have to say that I was
> surprised to see his dismay for this syntax. Then again, it took me
> some time to start appreciate it. But it might be that Oracle's
> proprietary operator for outer join (+= or whatever it is) is less
> horrible than SQL Server's old *=.
Consider these two INNER JOINS formatted to match.
-- ISO syntax
SELECT p.last_name, t.title_name
FROM person p , title t
WHERE p.title_1 = t.title_abbrev;
-- ANSI syntax
SELECT p.last_name, t.title_name
FROM person p INNER JOIN title t
ON p.title_1 = t.title_abbrev;
Line 2:
What advantage in replacing a single
comma with "INNER JOIN"?
Line 3:
What value in replace WHERE with ON
If performance is identical? The issue is not much
different from asking which is better, a car with
the steering on the right or a car with the steering
on the left.
Now I know those used to the ANSI syntax will likely
be thinking compatibility with other systems. But
those with 10+ years in Oracle will be thinking: So
what!
--
Daniel A. Morgan
http://www.psoug.org
damorgan@x.washington.edu
(replace x with u to respond)
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