Question

I have a query that checks a database for multiple customer barcode scans in a single day. This report works great, however I’d like to add another piece to it. I would like to include a column “Times Scanned” to the output. However, since i’m using “SUM” it won’t list multiple times on 1 line. For example if barcode “1234” is found to be scanned twice, I want the times it was scanned (tickets.dtcreated) to be listed in the “times Scanned” column as one output.

Here is my current Output:

Barcode    DtCreatedDate     Number of Scans   
    1234          1/1/2013            2            
    1235          1/1/2013            2            
    1563          1/2/2013            3         

Here is what I want my output to look like (Keep in mind the “Times Scanned” should only show the times on the day that multiple scans took place (DTcreateddate):

Barcode    DtCreatedDate     Number of Scans   Times Scanned
1234          1/1/2013            2            11:15AM, 12:15PM
1235          1/1/2013            2            9:00AM, 4:00PM
1563          1/2/2013            3            8:05AM, 8:08AM, 5:50PM

My Current Query is Below

 SELECT        Customers.sBarcode, CAST(FLOOR(CAST(Tickets.dtCreated AS FLOAT)) AS DATETIME) AS dtCreatedDate, COUNT(Customers.sBarcode) AS [Number of Scans]
FROM            Tickets INNER JOIN
                         Customers ON Tickets.lCustomerID = Customers.lCustomerID
WHERE        (Tickets.dtCreated BETWEEN @startdate AND @enddate) AND (Tickets.dblTotal <= 0)
GROUP BY Customers.sBarcode, CAST(FLOOR(CAST(Tickets.dtCreated AS FLOAT)) AS DATETIME)
HAVING        (COUNT(*) > 1)
ORDER BY dtCreatedDate

Answer 1

You can’t use SUM for this, but you can use FOR XML PATH. Add this to your SELECT list:

SELECT ...,
       STUFF((    SELECT ', ' + RIGHT(convert(varchar, sub.dtCreated, 100), 7)
                    FROM Tickets sub
                    WHERE sub.Ticket_ID = Tickets.Ticket_ID
                    FOR XML PATH('')
                    ), 1, 2, '' )
       AS [Times Scanned]
FROM Tickets
JOIN ...

The idea here is to use RIGHT(convert(varchar, sub.dtCreated, 100), 7) to get the formatted time, and then concatenate them using FOR XML PATH, while removing the leading comma with STUFF