Delete records which repeated less than or equal 2

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SQL-Server-2005

Hi all

Please tell me how to delete records which repeated less than or equal 2 times.
below is the select query i wrote to get the data which repeated more then 2 times in my database table

SQL

SELECT count(*) as count, bill_no
FROM transaction_details
GROUP BY bill_no
HAVING COUNT(*) > 2
ORDER BY bill_no;

Posted 26-Feb-15 17:28pm

Black_Rose

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Rajesh waran 26-Feb-15 23:49pm

Not Clear.Do you want to delete records which is repeated less than or equal to 2?
but your query returns repeated records greater than 2. Can you explain it clearly with sample data's?

Black_Rose 27-Feb-15 0:39am

This is a query i wrote to get the records repeated more then 2 time.
i want to keep this records and delete other records which repeated <=2 times

Rajesh waran 27-Feb-15 2:23am

Now i have updated my solution. Have a look

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Rajesh waran · Accepted Answer · 2015-02-26T18:00:00

Not Sure with my solution.If you want to delete records which is repeated less than or equal to 2,then try like this,
Edit:2

SQL

delete from transaction_detailswhere bill_no in (
select b.bill_no from transaction_details as a right join (
SELECT count(*) as count, bill_no
FROM transaction_details
GROUP BY bill_no
HAVING COUNT(*)<=2
) as b on a.bill_no=b.bill_no
);

Or if you want to delete records with count > 2, do like this

SQL

delete from transaction_detailswhere bill_no in (
select b.bill_no from transaction_details as a right join (
SELECT count(*) as count, bill_no
FROM transaction_details
GROUP BY bill_no
HAVING COUNT(*)>2
) as b on a.bill_no=b.bill_no
);