Subject | How do find duplicates in a table? |
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Author | stwizard |
Post date | 2016-02-04T19:09:35Z |
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