Hi Chetan,
If I get you correctly, I think you need an internal table to read many records, and then loop at it with a field symbol. At short example would be:
SELECT * FROM table
INTO TABLE local_table
WHERE .....
LOOP AT local_table ASSIGNING <field symbol>
....
ENDLOOP
Hope it helps
EDIT OF MINE: Another option would be doing a select statement and assign the results into the field symbol, like this:
DATA : TAB TYPE REF TO DATA.
FIELD-SYMBOLS: <FTAB> TYPE TABLE.
DATA: L_TABNAME TYPE DD02L-TABNAME VALUE 'some_name'.
CREATE DATA REF_TAB TYPE TABLE OF (L_TABNAME).
ASSIGN TAB->* TO <FTAB>.
SELECT * FROM (L_TABNAME) INTO TABLE <FTAB>.
