SQL Server : concatenate the primary key ID within a grouped statement - sql

Question

I am trying to select a grouped set of rows and concatenate those rows primary key values into the select statement and count the rows also and select that value.
Tables:
JobTable - JobID, ExpressJob, ItemID
ItemTable - ItemID, Colour, Size
Values in Jobs:
10001, true, 3
10002, true, 3
10003, false, 4
Values in Items:
3, Blue, 1-2
4, Pink, 5-6
Result set:
3,Blue,1-2,10001|10002
3,Pink,5-6,10003
I've explored the following within the select statement:
SELECT
i.ItemID, i.Colour, i.Size,
COUNT(i.ItemID) AS Quantity,
j.ExpressJob,
JobIDArray = STUFF((SELECT CONVERT(VARCHAR(10), jb.JOBID)
FROM Jobs jb
WHERE jb.JobID = j.JobID
FOR XML PATH(''), TYPE).value('.', 'VARCHAR(MAX)'), 1, 1, ''))
FROM
Jobs j
INNER JOIN
Items i ON i.ItemID = j.ItemID
GROUP BY
i.ItemID, i.Colour, i.Size, j.ExpressJob
But I keep getting an aggregate group error on JobID. From what I have researched online FROM XML is the way to go but for some reason not effective when selecting the ID column.

Answer 1

Small tweak to what you already have will get you there.
Give this a try:
DECLARE #Jobs TABLE
(
[JobID] INT
, [ExpressJob] NVARCHAR(100)
, [ItemID] INT
);
DECLARE #Items TABLE
(
[ItemID] INT
, [Colour] NVARCHAR(100)
, [Size] NVARCHAR(100)
);
INSERT INTO #Jobs (
[JobID]
, [ExpressJob]
, [ItemID]
)
VALUES ( 10001, 'true', 3 )
, ( 10002, 'true', 3 )
, ( 10003, 'false', 4 );
INSERT INTO #Items (
[ItemID]
, [Colour]
, [Size]
)
VALUES ( 3, 'Blue', '1-2' )
, ( 4, 'Pink', '5-6' );
SELECT [i].[ItemID]
, [i].[Colour]
, [i].[Size]
, [j].[ExpressJob]
, COUNT([i].[ItemID]) AS [Quantity]
--Added '|' as that was how you wanted the results delimited
, STUFF((
SELECT '|' + CONVERT(VARCHAR(10), [jb].[JobID])
FROM #Jobs [jb]
WHERE [jb].[ItemID] = [i].[ItemID] --Change here as you're looking for JobID associated to the Item.
FOR XML PATH('') --No need to set TYPE or use '.value'
)
, 1
, 1
, ''
) AS JobIDArray
FROM #Jobs [j]
INNER JOIN #Items [i]
ON [i].[ItemID] = [j].[ItemID]
GROUP BY [i].[ItemID]
, [i].[Colour]
, [i].[Size]
, [j].[ExpressJob];