Re: Select by priority again

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От darcy@druid.net (D'Arcy J.M. Cain)
Тема Re: Select by priority again
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Msg-id m13GnmQ-000AXeC@druid.net
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Ответ на Select by priority again  (Bernie Huang <bernie.huang@ec.gc.ca>)
Список pgsql-sql
     [Note:  PHP mailing list removed from Cc as this is strictly a     PostgreSQL question I think.]

Thus spake Bernie Huang
> Sorry about this, but I don't quite get previous postings regarding
> select by prioriry.
> 
> I have the same question with my sql. I want to be able to select
> cell_phone if there is one in the table; otherwise, I will select
> work_phone.
> 
> table
> ------
> id, name, address, cell_phone, work_phone,...
> 
> and I tried using "case when...end" but nope, it's not gonna work. Help
> is needed. Thanks.

Exactly what was the SQL statement and which version of PostgreSQL?  I
do this in a view and it works.
   SELECT CASE WHEN login IS NULL THEN uid::text ELSE login END AS login   FROM account;

-- 
D'Arcy J.M. Cain <darcy@{druid|vex}.net>   |  Democracy is three wolves
http://www.druid.net/darcy/                |  and a sheep voting on
+1 416 425 1212     (DoD#0082)    (eNTP)   |  what's for dinner.


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