Dear Kabil,
Use the Below ABAP Statements:
APPEND LINES OF itab1 TO itab2.
This statement appends the whole of itab1 to itab2. itab1 can be any type of table. The line type of itab1 must be convertible into the line type of itab2.
When you append an index table to another index table, you can specify the lines to be appended as follows:
APPEND LINES OF itab1 [FROM n1] [TO n2] TO itab2.
n1 and n2 specify the indexes of the first and last lines of itab1 that you want to append to itab2.
Thanks & Best Regards
Dinesh