How to count the duplicate values in SQL?

Question

Can anyone explain how to count the duplicate values in SQL?

Answer 1

We can use Group By and Having clauses to count the duplicate values in SQL. Here is the SQL query to count the duplicate values in a column of the table:

SELECT Column_name, COUNT(*) as Count_Duplicate

FROM Table_name

GROUP BY Column_name

HAVING COUNT(*) > 1

ORDER BY COUNT(*) DESC

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