text array accumulate to multidimensional text array

Dear list,

I would like to aggregate a text array into a multidimensional text array.

Let us say I have one table with two collumns

ID ARRAY
A {"A1","B1","C1"}
A {"A2","B2","C2"}
B {"A3","B3","C3"}

If I use a GROUP BY ID, I would like to receive following result:

ID ARRAY
A {{"A1","B1","C1"},{"A2","B2","C2"}}
B {{"A3","B3","C3"}}

I searched around but I didn't find any solution

Thank you for your help

Rainer