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* How I write pretty query.
@ 2003-04-29 15:49 Radovan Petrikí <r.petrik@episoftware.com>
0 siblings, 0 replies; 3+ messages in thread
From: Radovan Petrikí @ 2003-04-29 15:49 UTC (permalink / raw)
To: pgsql-sql
Hi ,
I have table
------------------
id | name
------------------
1 rado
2 marek
3 pista
I need make query. Your output is only (true or false)
This 2 query are good but no pretty.
1) SELECT COUNT(*) FROM table WHERE name=rado
-------------
output --> COUNT(*) 1
or
2) SELECT name FROM table WERE name=rado
-------------
output --> name rado
and this is pretty query :-) buy no good.
SELECT (true or false) FROM table WHERE name=rado
--------------
output ----> true
How I write good and pretty query ?
Thanks
Rado
^ permalink raw reply [nested|flat] 3+ messages in thread
* How I write pretty query
@ 2003-04-29 17:46 Rado Petrik <r.p@szm.sk>
0 siblings, 1 reply; 3+ messages in thread
From: Rado Petrik @ 2003-04-29 17:46 UTC (permalink / raw)
To: pgsql-sql
Hi ,
I have table
------------------
id | name
------------------
1 rado
2 marek
3 pista
I need make query. Your output is only (true or false)
This 2 query are good but no pretty.
1) SELECT COUNT(*) FROM table WHERE name=rado
-------------
output --> COUNT(*) 1
or
2) SELECT name FROM table WERE name=rado
-------------
output --> name rado
and this is pretty query :-) buy no good.
SELECT (true or false) FROM table WHERE name=rado
--------------
output ----> true
How I write good and pretty query ?
Thanks
Rado
^ permalink raw reply [nested|flat] 3+ messages in thread
* Re: How I write pretty query
@ 2003-04-29 17:55 Stephan Szabo <sszabo@megazone23.bigpanda.com>
parent: Rado Petrik <r.p@szm.sk>
0 siblings, 0 replies; 3+ messages in thread
From: Stephan Szabo @ 2003-04-29 17:55 UTC (permalink / raw)
To: Rado Petrik <r.p@szm.sk>; +Cc: pgsql-sql
On 29 Apr 2003, Rado Petrik wrote:
> I have table
>
> ------------------
> id | name
> ------------------
> 1 rado
> 2 marek
> 3 pista
>
> I need make query. Your output is only (true or false)
If you don't specifically care about the string true/false and
just want a boolean, probably something like:
select exists (select * from tab where name='rado');
If you really want the particular strings, use a case, something like:
select case when exists(select * from tab where name='rado') then
'true' else 'false' end;
^ permalink raw reply [nested|flat] 3+ messages in thread
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-- links below jump to the message on this page --
2003-04-29 15:49 How I write pretty query. Radovan Petrikí <r.petrik@episoftware.com>
2003-04-29 17:46 How I write pretty query Rado Petrik <r.p@szm.sk>
2003-04-29 17:55 ` Re: How I write pretty query Stephan Szabo <sszabo@megazone23.bigpanda.com>
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