SY-TABIX value of a loop in other loop in other loop.

Hello Gurus,

I have a problem i want to modify some columns in final internal table and it is possible by using Transporting and Index but when i see SY-TABIX value it is not really giving particular loop iteration value. Because my present loop is in another loop and it is in another loop. Please gurus help me out

or

How to Insert particular filed columns  and how to use where clause in insert..

Thanks.