How to delete records in the table which are repeated?

Question

Hi Here i came across a situation in which by mistakenly Without dropping the table i have run the batch file of the table which consists of some insert statements in detail

Answer 1

Following query will give you all records that you want to keep:

SELECT min(id)
FROM alert_priority
GROUP BY priority_name
HAVING count(*) > 1
    OR min(id) = max(id)

To remove all duplicates, run this query:

DELETE FROM alert_priority
WHERE id NOT IN (
    SELECT min(id)
    FROM alert_priority
    GROUP BY priority_name
    HAVING count(*) > 1
        OR min(id) = max(id)
)