Find duplicate column value in sqlite

Question

I have inserted some values in the table DataTab.

SomeId: Integer     => Autogenerated primary key.
DataId: Guid
DataNumber: Integer
DataTyp         


        

Answer 1

SELECT DataId, COUNT(*) c FROM DataTab GROUP BY DataId HAVING c > 1;

Answer 2

I have used it in my application. It is working based on your query

SELECT a.* 
FROM CENTERDETAILS a 
JOIN 
(SELECT IPADDR, MACID, COUNT(*) 
    FROM CENTERDETAILS  
    GROUP BY IPADDR, MACID 
    HAVING count(*) > 1
) b ON a.IPADDR = b.IPADDR OR a.MACID = b.mac 
ORDER BY a.MACID