create internal table from an existing internal table.

There’s an internal table , which have 10 columns, and I have to select records from it filtering by two columns co_a (which have value 1,2,3,4,5), and co_b ( which is used to store date).

I need three type subset ,

1. co_a =1 and co_b = date( getting from another internal table)

1. co_a =3 and co_b = date( getting from another internal table)

1. co_a =2,4,5 and co_b = date( getting from another internal table)

How can I get the subset(it may be another internal set) dynamically