Hi Sayed,
I am not sure what exacltly your requirement. As per my understanding you want to create some dynamic internal table so this can be achieved by using <FIELD-SYMBOL>.
Performance Field Symbols Vs Work Area | SCN
https://scn.sap.com/thread/70586
Check above link for releted to field-symbol.
There are several post available on SCN relatated to filed-symbol.
Hope this may help.
Regards
Avanida