Combine Multiple Rows Into A Single Column - sql

Question

I am working on a stored procedure for reporting purposes and I need to combine rows in a single column but I can't find a way to do this. I have four tables, Case, Debtor, DebtorAddress and CaseNote. Rather than try to do this in a single statement I decided to create a temp table with the columns needed, populate the ones that occupy a single row, then use an update statement to combine the multiple rows of the last column needed into a single row. My temp table has rows for CApKey (the ID of the Case table), OwnerName (from Debtor), Address (from DebtorAddress, and Note. For each Case there may be multiple Notes (stored in the CaseNote table). So I may have Case #1, with a CApKey value of 1, OwerName of John Jones, Address of 1234 Main St. There may be one Note the says 'Called and left message', another that says 'Sent letter', and another that says 'Left a second voicemail', etc. I'd like to combine the three notes into a single row with Note values of Called and left a message, Sent Letter, and Left a second voicemail. I can use space, period, or comma as a delimiter. I found a way to do the update in theory but I'm getting an error that the sub-query returned more than 1 value. Below is the "heart" of the procedure. I've been wracking my brain on this for two days now. Any assistance is greatly appreciated in advance. Here is the statement I'm trying:
CREATE TABLE #temp
(
CaseKey int,
OwnerName varchar(500),
Address varchar(500),
Note varchar(MAX)
)
DECLARE #val Varchar(MAX);
INSERT INTO #temp
(CaseKey, OwnerName, Address)
SELECT ca.CApKey, DEFirstName + ' ' + DELastName, da.DAAddress1
FROM [Case] ca INNER JOIN Debtor de ON ca.CApKey = de.CApKey INNER JOIN DebtorAddress da ON ca.CApKey = da.CApKey
WHERE ca.LFpKey = #LFpKey AND de.DEIsPrimary = 1
UPDATE #temp SET Note =
(SELECT COALESCE(#val + ', ' + CANNote, CANNote)
FROM CaseNote WHERE CApKey = 51)
--SELECT #val;)
SELECT * FROM #temp
Thanks!

Answer 1

If i understood you correctly, you need to combine all the notes.
Get your data, queried from the 4 tables into a table (ex. #t)
Then you can use XML PATH and Stuff to achieve your goal (later you can use that for whatever your purpose as inserting to a table or display in a report etc)
SELECT CaseKey, OwnerName, Address, (STUFF((
SELECT ', ' + Note
FROM #t tx
where tx.CaseKey = t.CaseKey and tx.OwnerName = t.OwnerName and tx.Address = t.Address
FOR XML PATH('')
), 1, 2, '')
) AS StringValue
From #t t
Group by CaseKey, OwnerName, Address
Here is the fiddle