Обсуждение: how to find duplicates key

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how to find duplicates key

От
Christian Valverde
Дата:
how do i find a duplicate key so i can make a unique index

Re: how to find duplicates key

От
Heath Tanner
Дата:
On Monday, September 15, 2003, at 04:01  PM, Christian Valverde wrote:

> how do i find a duplicate key so i can make a unique index

SELECT my_key, count(*) FROM my_table GROUP BY my_key HAVING count(*) >
1;

-heath