Question

I have a table with several “ticket” records in it. Each ticket is stored by day (i.e. 2011-07-30 00:00:00.000) I would like to count the unique records in each month by year I have used the following sql statement

SELECT DISTINCT
   YEAR(TICKETDATE) as TICKETYEAR,
   MONTH(TICKETDATE) AS TICKETMONTH,
   COUNT(DISTINCT TICKETID) AS DAILYTICKETCOUNT
FROM
   NAT_JOBLINE
GROUP BY
   YEAR(TICKETDATE),
   MONTH(TICKETDATE)
ORDER BY
   YEAR(TICKETDATE),
   MONTH(TICKETDATE)

This does produce a count but it is wrong as it picks up the unique tickets for every day. I just want a unique count by month.

Answer 1

Try combining Year and Month into one field, and grouping on that new field.
You may have to cast them to varchar to ensure that they don’t simply get added together. Or.. you could multiple through the year…

SELECT    
   (YEAR(TICKETDATE) * 100) + MONTH(TICKETDATE),
   count(*) AS DAILYTICKETCOUNT
FROM    NAT_JOBLINE GROUP BY
 (YEAR(TICKETDATE) * 100) + MONTH(TICKETDATE)