I am attempting to merge something like this in my SQL Server database:
[TicketID], [Person]
T0001 Alice
T0001 Bob
T0002 Catherine
T0002 Doug
T0003 Elaine
Into this:
[TicketID], [People]
T0001 Alice, Bob
T0002 Catherine, Doug
T0003 Elaine
I need to do this in both SQL Server and Oracle.
I have found the function GROUP_CONCAT
for MySQL that does exactly what I need here, but MySQL is not an option here.
EDIT: Test bench:
DECLARE @Tickets TABLE (
[TicketID] char(5) NOT NULL,
[Person] nvarchar(15) NOT NULL
)
INSERT INTO @Tickets VALUES
('T0001', 'Alice'),
('T0001', 'Bob'),
('T0002', 'Catherine'),
('T0002', 'Doug'),
('T0003', 'Elaine')
SELECT * FROM @Tickets
Answer
Here is a solution that works in SQL Server 2005+:
SELECT t.TicketID,
STUFF(ISNULL((SELECT ', ' + x.Person
FROM @Tickets x
WHERE x.TicketID = t.TicketID
GROUP BY x.Person
FOR XML PATH (''), TYPE).value('.','VARCHAR(max)'), ''), 1, 2, '') [No Preceeding Comma],
ISNULL((SELECT ', ' + x.Person
FROM @Tickets x
WHERE x.TicketID = t.TicketID
GROUP BY x.Person
FOR XML PATH (''), TYPE).value('.','VARCHAR(max)'), '') [Preceeding Comma If Not Empty]
FROM @Tickets t
GROUP BY t.TicketID
Reference:
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