SQL Query to Group By and Concat rows

问题

Hi I have the following table:

Doc      |  code    | Qty | Next
5211386  |  91992   |  1  | 52183
5211386  |  91992   |  1  | 52182

I trying to figure out a way to group the records by the first two colums, sum the third and concat the last column to obtain something like:

Doc      |  code    | Qty | Next
5211386  |  91992   |  2  | 52183-52182

Any help?

回答1:

Sounds like you're looking for a group_concat like function found in MySQL. Check out Allen Browne's solution

SELECT Doc, code, Sum(Qty), ConcatRelated("[Next]","TableName",,,"-") as [Next]
FROM TableName
GROUP BY Doc, code

来源：https://stackoverflow.com/questions/11232153/sql-query-to-group-by-and-concat-rows