Answer / sateesh

Clear: Clear is used to clear the memory of the workarea
and Internal table.
Refresh : It is used to clear only the Internal table
memory.
FREE: It is use to clear the workarea,internal table at the
same time it will return the free memory back to Database.
data: Lt_tab type table of MARA,
ls_tab type mara.
Syn: CLEAR ls_tab.
CLEAR lt_tab[] - But this is Obsulute in ECC6.0
SYN: Refresh LT_TAB.
SYN: FREE LT_TAB.

Answer / nilesh biswas

in case of an internal table clear clears all fields in the header line.
refersh clears the body of internal table but the memory remains allocated
and free clears body as well as makes memory free.

Answer / mohan

CLEAR WILL CLEARS THE CONTENTS OF WORK AREA AND INTERNAL
TABLE BODY.
REMOVE WILL CLEARS THE WORK AREA ONLY.

FREE WILL CLEARS WORK ARAE , BODY AND MEMORY ALSO.

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