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first 5 records from a db2 table

 
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jagan
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Joined: 27 Jan 2003
Posts: 5
Topics: 4
PostPosted: Mon Feb 17, 2003 3:56 am    Post subject: first 5 records from a db2 table Reply with quote
how to retrive first 5 records from a db2 table
pl let me know the answer
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kolusu
Site Admin
Site Admin


Joined: 26 Nov 2002
Posts: 12376
Topics: 75
Location: San Jose
PostPosted: Mon Feb 17, 2003 6:49 am    Post subject: Reply with quote
jagan,

If you have db2 version 7 then you can use the following query to get 5 records of the table.

Code:

SELECT *
  FROM TABLE
  FETCH FIRST 5 ROWS ONLY
  ;


Check this link for a detailed explanation of FETCH FIRST

http://publibz.boulder.ibm.com/cgi-bin/bookmgr_OS390/BOOKS/DSNSQH11/4.4.7?SHELF=&DT=20010718164132

Hope this helps...

cheers

kolusu
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jagan
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Joined: 27 Jan 2003
Posts: 5
Topics: 4
PostPosted: Tue Feb 18, 2003 2:08 am    Post subject: Reply with quote
thanks kolusu
is it possible to get last 5 records from a table?in the same way?
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Himesh
CICS Forum Moderator
CICS Forum Moderator


Joined: 20 Dec 2002
Posts: 80
Topics: 21
Location: Chicago
PostPosted: Tue Feb 18, 2003 3:15 am    Post subject: Reply with quote
Jagan,

If you had referred to the same link that Kolusu had posted, you would have come across the following statement:

Quote:

If both the FETCH FIRST clause and the ORDER BY clause are specified, the ordering is performed on the entire result set prior to returning the first n rows.


So, you could fetch the last 5 rows by using an ORDER BY DESC clause in your SQL.

Example:

Code:

SELECT *
  FROM TABLE
WHERE Col1 = :host-var
ORDER BY COL1 DESC
  FETCH FIRST 5 ROWS ONLY
  ;


regards,
Himesh
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