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How to delete the duplicate records in a table

 
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sundar_svb

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Joined: 16 Oct 2005
Posts: 1

PostPosted: Wed Oct 19, 2005 11:57 pm    Post subject: How to delete the duplicate records in a table
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hi ..
how to delete duplicate records in a table.....


By,
Sundar
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sairam

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Joined: 30 Aug 2005
Posts: 58
Location: Kolkata

PostPosted: Thu Oct 20, 2005 10:08 am    Post subject:
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Hi Sundar

I think it is not possible to delete duplicate records keeping one from the table with no primary key.
So to add an primary key (ex. id) then follow this query

Delete from Test s where id <
(Select Max(id) from Test t where s.a = t.a and
s.b = t.b and
s.c = t.c)


or you can transfer the one distinct record to another table and delete all in original table and then transfer the distinct one back.

Try this one (i am not sure)
for transferring distinct record to a table which is not exist

select distinct * into <NewTable> from <MyTable>
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paulstephen

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Joined: 20 Oct 2005
Posts: 20
Location: Chennai

PostPosted: Thu Oct 20, 2005 4:33 pm    Post subject:
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If its a one time requirment u can also use file aid for DB2.
If its on a routine basis plz use a cursor with for delete of option in ur application program
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