Grouping dataset by concatenating text column with separator

lpdutra

Hello friends, I'm trying to group the dataset as shown below, but I'm not getting it. I think it's possible to use a custom key, but I don't know which SQL Expression to use. Has anyone ever had to do something like this?

Input:

order | product | value

100 | product A | 10.00

100 | product B | 5.00

Output:

order | concat_product | sum_value

100 | product A, product B | 15.00

Thank you,

Portes, Leo

[Edit]: Solution (Image)

Alex_Reutter

I think STRING_AGG() is what you're looking for: https://www.postgresql.org/docs/current/static/functions-aggregate.html.

lpdutra

Hi Alex,

It worked with this function, but I had to use it in "Custom aggregations" and not in "Custom key" as I had thought.

string_agg("product", ',')

Thanks a lot for the help,
Leo