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Find Duplicate records in SQL table

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Suppose our tablename is masterorder with column orderid for which we are goin to find duplicate records.
SELECT orderid, COUNT(*) TotalCount
FROM masterorder
GROUP BY orderid

U might have come across a situation like there are number of duplicated records in a table.
Now Its Ur duty to remove duplicacy of data from the table, So the first step would be to find out duplicate records against each column.