Re: [SQL] Finding duplicated values

[lorid]

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 EZYield.com 407-629-0900 www.ezyield.com   ======================================== This electronic message transmission contains information from the Company that may be proprietary, confidential and/or privileged. The information is intended only for the use of the individual(s) or entity named above.  If you are not the intended recipient, be aware that any disclosure, copying or distribution or use of the contents of this information is prohibited.  If you have received this electronic transmission in error, please notify the sender immediately by replying to the address listed in the "From:" field.   ****************************** This might do it... If you do this on the table that had duplicates you wont need to join select count(hmhmkey),count(wmwmkey) from exceptions group by hmhmkey,wmwmkey having count(hmhmkey) >1 or having count(wmwmkey) >1;