Re: Finding duplicated values

Kent Anderson wrote:

>  I have a few tables that have duplicated values from an import from a
> different database. I have two keys I tried to set as primary and got
> an error ERROR:  could not create unique index
> DETAIL:  Table contains duplicated values.Is there some join I can use
> to compare the hmhmkey, wmwmkey pairs against the table to find
> duplicate values? Each pair key should be unique but the old database
> was less than normalized.I was trying to use the code below but it
> returned no rows.SELECT hmhmkey, wmwmkey
> FROM   exceptions
> EXCEPT
> SELECT hmhmkey, wmwmkey FROM  exceptions;Any suggestions?Kent
> Anderson

You might want to search the [SQL] archive on the following topics
for more inspiration:

selecting duplicate records
Delete 1 Record of 2 Duplicate Records

Regards, Christoph