How to find repeated Rows?

i am having 75000 row records i need to get how ma开发者_运维问答ny of them repeated,how can i do that in MySQL Query?

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This query will return all duplicate rows, and the number of times they are duplicated

SELECT Col1, Col2,..ColLast, Count(*) As NumDups FROM YourTable
GROUP BY Col1,Col2,...,ColLast
HAVING COUNT(*) > 1;