SQL comma-separated row with Group By clause

Question

I have the following query:

SELECT
  Account,
  Unit,
  SUM(state_fee),
  Code
FROM tblMta
WHERE MTA.Id = \'123\'
GROUP BY Account,Unit

Thi

Answer 1

There is no built-in aggregate function to concatenate, but this article discusses several alternative solutions, including a user-defined concatenate aggregate function:

https://www.simple-talk.com/sql/t-sql-programming/concatenating-row-values-in-transact-sql/