Question on OUTER JOINS.

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От Ludwig Lim
Тема Question on OUTER JOINS.
Дата
Msg-id 20030628054547.40824.qmail@web80503.mail.yahoo.com
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Ответы Re: Question on OUTER JOINS.  (Tom Lane <tgl@sss.pgh.pa.us>)
Список pgsql-sql
Hi:
 1) Is the ON clause of an OUTER JOIN always
evaluated first before the WHERE clause?
2) Given the ff SQL statement :
  SELECT employee_id,         a.status as status  FROM permissions a LEFT JOIN      (select * from employee where
employee_id= 3)
 
as b on (a.status=b.status)  WHERE a.status='test';
 Is there a way to rewrite the query as a view such
that one can do:
  select *  from test_view  where employee_id=3 and status='test';

Thank you very much,

ludwig lim

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