Composite Secondary Index- - forum topic by Nishant.Bhardwaj

Hi Experts,
We have a query which summarise the data based on 2 column col_A and col_b of a table .. if we decide to create Secondary Indexes on col_a and col_B then
individual SI's on col_A  and col_b would be helpful or a composite SI on col_a and col_b would be helpful?
which one would cover the query?
cheers!
Nishant