Question

I have a table (tbl_MatterItem) in my DB that tracks the dates that items are sent and received. If it hasn’t been sent or received, the value is NULL. I have another table (tbl_Matter) that I am linking to, to get the BillingLawyer for that particular item.

BillingLawyer     ItemSent     ItemReceived
-------------     --------     ------------
   Alison         09/09/09        NULL
   Alison         10/10/10        NULL
   Alison         11/11/11       13/11/11
   Alison         12/12/12        NULL

I would like to retrieve one row for each lawyer with their name, the number of items sent, and the number of items received.

BillingLawyer    Sent    Received
-------------    -----   --------
   Alison         4         1

Below is what I have so far:

SELECT BillingLawyer, 
(SELECT COUNT(DISTINCT itemSent)FROM tbl_matteritem mit WHERE itemid=2 AND itemSent IS NOT NULL AND mit.ItemSent= mi.itemSent) AS [Sent], 
(SELECT COUNT(DISTINCT itemReceived)FROM tbl_matteritem mitm WHERE itemid=2 AND itemReceived IS NOT NULL AND mitm.itemreceived = mi.itemreceived)AS Received
FROM tbl_matteritem mi JOIN tbl_matter m ON mi.matterid = m.matterid
GROUP BY BillingLawyer, ItemSent, itemreceived
ORDER BY 1

However my results show with an extra record and what appears to be bit values?:

BillingLawyer    Sent    Received
-------------    ----    --------
   Alison         0         0
   Alison         1         1
   Alison         1         0
   Alison         1         0
   Alison         1         0

Any ideas where I am going wrong?

Answer 1

Try this:

SELECT
    BillingLawyer,
    SUM(CASE WHEN ItemSent IS NOT NULL THEN 1 ELSE 0 END) AS Sent,
    SUM(CASE WHEN ItemReceived IS NOT NULL THEN 1 ELSE 0 END) AS Received
FROM
    tbl_matteritem mi
JOIN tbl_matter m ON
    mi.matterid = m.matterid
GROUP BY BillingLawyer
ORDER BY BillingLawyer