How to create a simple ALV List using DDIC structure

The following two entities are necessary to populate the fields of the ALV list.

a. Database Table or Structure

b. Internal Table

Contact_Id	Contact_Name	Contact_Address
101	Mike	Street 10
102	Raj	Street 11
103	Thiru	Street 12

DATA lt_internal_table TYPE TABLE OF ztt_db_table1.

DATA ls_structure Like LINE OF lt_internal_table.

SELECT * FROM ztt_db_table1 INTO TABLE lt_internal_table

CALL FUNCTION ‘REUSE_ALV_GRID_DISPLAY’

              EXPORTING

                            i_structure_name = ‘ZTT_DB_TABLE1’

              TABLES

                            T_outtab = lt_internal_table