Question

I have a table named ‘entity‘ in DB which consists of

id,
entityname,
created time,
modified time.

I want to retrieve only records which have duplicate entries like if there are two entities with name Arthur then i want only that two records.
I couldn’t construct the query as comparing entityname with entity name is returning me all the records.

Answer 1

SELECT * 
FROM entity 
WHERE entityname IN 
(SELECT entityname 
 FROM entity 
 GROUP BY entityname 
 HAVING COUNT(*) > 1)