Problem with using two different sum()'s on same column - tsql

Question

I'm trying to get two different counts on the same column. The first count works fine with the constraints given, but the second count is not counting correctly. I have two tables, which are DailyFieldRecord and AB953. DailyFieldRecord contains: DailyFieldRecordID and ActivityCodeID. The AB953 table contains:DailyFieldRecordID, ItemID, and GroupID. Count1 will return the count of the DailyfieldrecordID's that contain ActivityCodeID=387 and GroupID=260 and that DON'T have ItemID in (1302,1303,1305,1306). Count2 will return the count of the DailyfieldrecordID's that contain ActivityCodeID=387 and GroupID=260 and that HAVE ItemID in (1302,1303,1305,1306). I'm trying to only get the count of the GroupID =260 for each DailyFieldRecordID that corresponds with the above constraints.
DailyFieldRecord: AB953:
DailyFieldRecordID ActivityCodeID DailyFieldRecordID: ItemID: GroupID:
657 387 657 1305 210
888 420 657 1333 260
672 387 657 1335 260
657 1302 210
657 1334 260
657 1111 111
888 1302 210
888 1336 260
672 1327 260
672 1334 260
672 1335 260
672 1322 260
672 1222 420
Expected Output:
Count1: Count2:
4 3
Count1 is supposed to count: Count2 is supposed to count:
672 1327 260 657 1333 260
672 1334 260 657 1335 260
672 1335 260 657 1334 260
672 1322 260
Current Count:
Count1: Count2:
4 6
SELECT sum(CASE WHEN ex=0 THEN 1 ELSE 0 END) AS COUNT1,sum(EX) AS COUNT2
FROM AB953 ab
JOIN DailyFieldRecord dfr
ON dfr.DailyFieldRecordID = ab.DailyFieldRecordID
JOIN ( SELECT AB1.DailyFieldRecordID,sum(CASE WHEN AB1.ItemID IN
(1302,1303,1305,1306) THEN 1 ELSE 0 END) AS EX
FROM AB953 AB1
GROUP BY AB1.DailyFieldRecordID) T
ON dfr.DailyFieldRecordID = T.DailyFieldRecordID
WHERE dfr.ActivityCodeID = 387
AND ab.GroupID = 260

Answer 1

First need to identify all of the DailyFieldRecordIDs that have any of the ItemIDs specified, which is what the sub-query here is doing. Then you can determine if the record in the outer query belongs to Count1 or Count2 based on where or not it exists in the result set of the subquery.
select sum(case when i.DailyFieldRecordID is null then 1 else 0 end) as Count1
, sum(case when i.DailyFieldRecordID is null then 0 else 1 end) as Count2
from AB953 as ab
inner join DailyFieldRecord as dfr on ab.DailyFieldRecordID = dfr.DailyFieldRecordID
left join (
select distinct a.DailyFieldRecordID
from AB953 as a
where a.ItemID in (1302, 1303, 1305, 1306)
) as i on ab.DailyFieldRecordID = i.DailyFieldRecordID
where dfr.ActivityCodeID = 387
and ab.GroupID = 260
Final Output:
+--------+--------+
| Count1 | Count2 |
+--------+--------+
| 4 | 3 |
+--------+--------+