Topic: Oracle Certified Professional Exams (OCP & OCA) >> Sql Query!!!!!!!!!!
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| Title: Sql Query!!!!!!!!!! |
| Rush |
Posted: Apr 04, 2008 05:10:05 AM |
Total Post: 125
Joined: Jan, 2007
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Hi all,
I want to know about % result of some table.means
i want to select 10%/20% of data from a table .
is there any way?
Thanks
Rupesh |
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 Ramesh Joyisa |
| Posted: Apr 04, 2008 06:17:37 AM |  |
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Total Post: 245
Joined: Aug, 2007
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Hello Rupesh,
You can try
select * from table where rownum < ((select count(1) from table)*n)
In the above query replace table by table name and n by % u want i.e. if u want 10% then put 0.1 , if u want 20% use 0.2
u wil get the result..
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| Murtuja |
| Posted: Apr 04, 2008 06:28:53 AM | |
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Total Post: 843
Joined: Jan, 2006
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Use analytic function to gain performance in such query.
See CJ's answer in the below link .
http://forums.oracle.com/forums/thread.jspa?messageID=1430123
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