Parent-Child Case Aggregation

I have a table with a Parent Case column and a Child Case column. For Parent Case P-1, there are three rows with Child Cases C-1, C-2, and C-3.

Parent Case Child Case
P-1 C-1
P-1 C-2
P-1 C-3

I want to fetch all three child cases in a single row using a Report Definition. Like C-1,C-2,C-3

@Siva SankarYour requirements needs recursion in SQL (or a different aggregate function) which is currently not available in Report Definitions.