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finding data thats not there

Author

Topic

superslip103
Starting Member

1 Post

Posted - 2006-04-07 : 04:38:51

Hi
I'm trying to find some entries in a table which aren't there, from a list I have. I know "NOT EXISTS" does not work. Here's what I want to do. Basically I need to check that a list of entries in my table exists before I do a mass update on the data. So I did a

SELECT * FROM AMHOST
WHERE hostname IN
(
'hostname1',
'hostname2',
.......
'hostname700'
);

This returned 697 results, which means that 3 entries are missing.
How Do I find out which 3 are missing from the table?

Please help!

Regards,
Rohit

madhivanan
Premature Yak Congratulator

22864 Posts

Posted - 2006-04-07 : 04:49:04

Refer this
http://www.mindsdoor.net/SQLTsql/FindGapsInSequence.html

Madhivanan

Failing to plan is Planning to fail

shallu1_gupta
Constraint Violating Yak Guru

394 Posts

Posted - 2006-04-07 : 04:51:06

Use not in
SELECT * FROM AMHOST
WHERE hostname NOT IN
(
'hostname1',
'hostname2',
.......
'hostname700'
);

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