[firebird-support] How do find duplicates in a table?

 

Greetings All,

 

How do I form a SQL Select statement that will return which records in my PERSON table have duplicate SOC_SEC_NO.

 

In other words I need a list of persons where the social security number appears in the database more than once.  Some SOC_SEC_NO may be null which I do not care about.

 

PERSON:

PERSON_ID

SOC_SEC_NO

 

Any help appreciated,

Mike

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Posted by: "stwizard" <stwizard@att.net>

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