Huh?
Yeah, I know.
This is a test, see if you can code this actual client request before you look at my solution.
The requirement is to return a list of orders where the order has ALL of the items supplied in a comma separated list of parameters. So, if the parameter is 'ITEM1,ITEM2', the code would return a list of orders where the order has BOTH ITEM1 and ITEM2.
Our code starts like this
declare @items varchar(max)
declare @count int
--declare a table that mimics the SOP LINE table in Dynamics GP
declare @SOP10200 table (SOPNUMBE VARCHAR(21), ITEMNMBR VARCHAR(31))
--insert a series of orders
INSERT INTO @SOP10200 (sopnumbe, ITEMNMBR) values ('ORD001','ITEM01')
INSERT INTO @SOP10200 (sopnumbe, ITEMNMBR) values ('ORD001','ITEM02')
INSERT INTO @SOP10200 (sopnumbe, ITEMNMBR) values ('ORD001','ITEM03')
INSERT INTO @SOP10200 (sopnumbe, ITEMNMBR) values ('ORD002','ITEM02')
INSERT INTO @SOP10200 (sopnumbe, ITEMNMBR) values ('ORD002','ITEM03')
INSERT INTO @SOP10200 (sopnumbe, ITEMNMBR) values ('ORD002','ITEM04')
INSERT INTO @SOP10200 (sopnumbe, ITEMNMBR) values ('ORD003','ITEM03')
INSERT INTO @SOP10200 (sopnumbe, ITEMNMBR) values ('ORD003','ITEM04')
INSERT INTO @SOP10200 (sopnumbe, ITEMNMBR) values ('ORD003','ITEM05')
INSERT INTO @SOP10200 (sopnumbe, ITEMNMBR) values ('ORD004','ITEM03')
INSERT INTO @SOP10200 (sopnumbe, ITEMNMBR) values ('ORD004','ITEM04')
INSERT INTO @SOP10200 (sopnumbe, ITEMNMBR) values ('ORD004','ITEM05')
INSERT INTO @SOP10200 (sopnumbe, ITEMNMBR) values ('ORD004','ITEM06')
-- the @items parameter holds a comma separated list of items
--To test, vary these items
select @items = 'ITEM03, ITEM04'
So, given items ITEM03, ITEM04', above, we need a query that returns the orders that have those items:

Order ORD001 would not return, because it does not have ITEM004
Code your own solution, then look at mine.