Select and display only duplicate records in mysql

Question

This question is pretty simple I for some reason cant get the proper result to display only the duplicate records

Table   : Paypal_ipn_orders
id                      


        

Answer 1

Try this query:

SELECT id, COUNT( payer_email ) `tot`
FROM paypal_ipn_orders
GROUP BY id
HAVING `tot` >1

Does it help?

Answer 2

I think this way is the simplier. The output displays the id and the payer's email where the payer's email is in more than one record at this table. The results are sorted by id.

    SELECT id, payer_email
    FROM paypal_ipn_orders
    WHERE COUNT( payer_email )>1
    SORT BY id;

Answer 3

The IN was too slow in my situation (180 secs)

So I used a JOIN instead (0.3 secs)

SELECT i.id, i.payer_email
FROM paypal_ipn_orders i
INNER JOIN (
 SELECT payer_email
    FROM paypal_ipn_orders 
    GROUP BY payer_email
    HAVING COUNT( id ) > 1
) j ON i.payer_email=j.payer_email

Answer 4

SELECT id, payer_email
FROM paypal_ipn_orders
WHERE payer_email IN (
    SELECT payer_email
    FROM paypal_ipn_orders
    GROUP BY payer_email
    HAVING COUNT(id) > 1
)

sqlfiddle

Answer 5

here is the simple example :

select <duplicate_column_name> from <table_name> group by <duplicate_column_name> having count(*)>=2

It will definitly work. :)

Answer 6

Get a list of all duplicate rows from table:

Select * from TABLE1 where PRIMARY_KEY_COLUMN NOT IN ( SELECT PRIMARY_KEY_COLUMN
FROM TABLE1 
GROUP BY DUP_COLUMN_NAME having (count(*) >= 1))