Flatten the input table.
One row of the output table regroups several rows of the input table.
This makes the output table “flatter” than the “input table” (thus the name: “flatten”).
For example: We want to transform this table (where each row is a day):
… into this one (where each row is a week):
You can run the Flatten Action inside a N-Way multithreaded Section if the “partitioning” parameter of the Multithread Action is equal to the “Key Column” of the the Flatten Action: see section 18.104.22.168. for more information about this subject.