REPORT  Z07_001.

TYPES: BEGIN OF line,
                col1 TYPE I,
                col2 TYPE I,
        END OF line.

DATA itab TYPE HASHED TABLE OF line WITH UNIQUE KEY col1
                        WITH HEADER LINE.

DO 4 TIMES.
        itab-col1 = sy-Index.
        itab-col2 = sy-Index ** 2.
        INSERT Table itab.
ENDDO.

itab-col1 = 2.
READ TABLE itab FROM itab.
itab-col2 = 100.

MODIFY TABLE itab.
itab-col1 = 4.

DELETE TABLE itab.

LOOP AT itab.
        WRITE: / itab-col1, itab-col2.
ENDLOOP.