Count multiple columns in a query for multiple criteria - sql

Question

I have a query that should count the number of items used by department.
The first two tables give me the units and the persons who used the items.
The third table tells who used what.
STAFF(EMPID,EMPNAME,UNITCTR)
CAFUNIT(UNITCTR, UNITDSC)
CAFTRXHD(BILLNO,TRXDATE,ITEMCODE,ITEMPRICE,ITEMDESC,ITEMPRICE,EMPID)
This is the query
SELECT a.UNITCTR, b.UNITDSC, COUNT(c.ITEMCODE)
FROM UNIT.STAFF a, UNIT.CAFUNIT b, UNIT.CAFTRXHID c
WHERE a.UNITCTR = b.UNITCTR
AND c.ITEMCODE IN ('397', '398', '399', '400', '401', '402', '403')
GROUP BY a.UNITCTR, b.UNITDSC
This returns the count of all used items by department for example Department A used 200 of these items, so I get the Department ID, name and the total count of items.
123|Cafeteria|200
where 200 is the sum of all of these items (397 to 403)
I need to know the count for each item by department for instance Department A used 10 boxes of item 397 and 5 of item B and …
123|Cafeteria|20|20|50|30|50|10|70
Using what is suggested here isn't working or I am not doing it right. Any ideas?

Answer 1

Hello after checking you request, follows a query what I think could help you, I'm using two queries with partition, one to group all items by unit and another to group items by unit and item code.
WITH STAFF AS (
SELECT * FROM (
VALUES
(1, 'John Smith','U1'),
(2, 'David Thompson','U2'),
(3, 'Stacey Leigh','U3')
) AS _ (EMPID,EMPNAME,UNITCTR)
),CAFUNIT AS (
SELECT * FROM (
VALUES
('U1', 'Unit 1'),
('U2', 'Unit 2'),
('U3', 'Unit 3')
) AS _ (UNITCTR,UNITDSC)
),CAFTRXHD as (
SELECT * FROM (
VALUES
(1, '2022-01-01','item 1',100,'Item desc 1',1),
(2, '2022-02-01','item 2',200,'Item desc 2',2),
(3, '2022-03-01','item 3',300,'Item desc 3',3),
(4, '2022-01-01','item 1',100,'Item desc 1',1),
(5, '2022-01-01','item 2',100,'Item desc 2',1),
(6, '2022-01-01','item 2',100,'Item desc 2',1),
(7, '2022-02-01','item 2',200,'Item desc 2',2),
(8, '2022-02-01','item 2',200,'Item desc 2',2),
(9, '2022-03-01','item 3',300,'Item desc 3',3),
(10, '2022-03-01','item 3',300,'Item desc 3',3),
(11, '2022-03-01','item 3',300,'Item desc 3',3)
) AS _ (BILLNO,TRXDATE,ITEMCODE,ITEMPRICE,ITEMDESC,EMPID)
),
--Get all item group by Unit
GetAllByUnit as (
SELECT
t.* FROM
(
SELECT
IT.UNITCTR,
IT.UNITDSC,
(SUM(ITEMPRICE) OVER (partition by IT.UNITCTR order by IT.UNITDSC)) as TotalValue
FROM
CAFTRXHD as HD
INNER JOIN STAFF as FF ON HD.EMPID = FF.EMPID
INNER JOIN CAFUNIT as IT ON FF.UNITCTR = IT.UNITCTR
) as t
GROUP BY t.UNITCTR, T.UNITDSC, T.TotalValue
),
--Get all item group by Unit and Item code
GetAllByUnitAndCode as (
SELECT
t.* FROM
(
SELECT
IT.UNITCTR,
IT.UNITDSC,
HD.ITEMCODE,
(SUM(ITEMPRICE) OVER (partition by IT.UNITCTR,HD.ITEMCODE order by IT.UNITDSC)) as TotalValue
FROM
CAFTRXHD as HD
INNER JOIN STAFF as FF ON HD.EMPID = FF.EMPID
INNER JOIN CAFUNIT as IT ON FF.UNITCTR = IT.UNITCTR
) as t
GROUP BY t.UNITCTR, T.UNITDSC, T.ITEMCODE, T.TotalValue
)
SELECT * FROM GetAllByUnit
--SELECT * FROM GetAllByUnitAndCode
The result
UNITCTR UNITDSC TotalValue
U1 Unit 1 400
U2 Unit 2 600
U3 Unit 3 1200
Comment the query last line --SELECT * FROM GetAllByUnit and remove the comment over SELECT * FROM GetAllByUnitAndCode
--SELECT * FROM GetAllByUnit
SELECT * FROM GetAllByUnitAndCode
The result here is top down not only one line
UNITCTR UNITDSC ITEMCODE TotalValue
U1 Unit 1 item 1 200
U1 Unit 1 item 2 200
U2 Unit 2 item 2 600
U3 Unit 3 item 3 1200
Best Regards