Обсуждение: restircting rows

<p>   <br />   <br /> hi all,<br /><br /> my query return 100 rows but if i am intrested only from 40-60 rows then how
torestrict.<br /><br /> for example<br /><br /> select * from students (returns 100 rows).but i am intrested only rows
from40 to 60. <br /><br /><a
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am  22.02.2006, um  9:06:57 -0000 mailte padmanabha konkodi folgendes:
>   
>   
> hi all,
> 
> my query return 100 rows but if i am intrested only from 40-60 rows then how to restrict.
> 
> for example
> 
> select * from students (returns 100 rows).but i am intrested only rows from 40 to 60.

select * from students limit 20 offset 40;


HTH, Andreas
-- 
Andreas Kretschmer    (Kontakt: siehe Header)
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padmanabha konkodi wrote:
> 
> 
> hi all,
> 
> my query return 100 rows but if i am intrested only from 40-60 rows
> then how to restrict.
> 
> for example
> 
> select * from students (returns 100 rows).but i am intrested only
> rows from 40 to 60.

SELECT * FROM student ORDER BY something LIMIT 20 OFFSET 40;

Be aware that this will have to fetch 60 rows and throw the first 40 away.


--   Richard Huxton  Archonet Ltd

On Feb 22, 2006, at 18:06 , padmanabha konkodi wrote:
> my query return 100 rows but if i am intrested only from 40-60 rows  
> then how to restrict.
>
> for example
>
> select * from students (returns 100 rows).but i am intrested only  
> rows from 40 to 60.

See LIMIT and OFFSET.
http://www.postgresql.org/docs/8.1/interactive/sql-select.html#SQL-LIMIT

Michael Glaesemann
grzm myrealbox com