Question

I have a table with columns: id and created(datetime)

id  created
6   2011-11-04 20:32:09.673
5   2011-11-04 20:32:09.673
4   2011-11-04 20:29:55.000
3   2011-11-04 20:29:55.000

How to write sql, that will return counts of records that haven’t, have 2 or have more than 2 equal creation dates. It can be 3 separate sqls.

Thank you

Answer 1

If I understand your question correctly, I believe this should do the trick, returning any creation dates that occur more than once.

This one will get those with more than 2.

SELECT
    created
    ,COUNT(*) as [occurrences]
FROM
    tableName
GROUP BY
    created HAVING COUNT(*) > 2

Swap the > 2 for an = 2 to get those with 2 exactly and =1 to get those with only 1 occurrence.