Answer Posted / buddula15

Hashed Table:
You can imagine a hashed table as a set, whose elements you
can address using their unique key. Unlike standard and
sorted tables, you cannot access hash tables using an index.
All entries in the table must have a unique key.Hashed table
is useful when your have to work with very big internal
table and to read it with "READ TABLE WITH KEY ..." .

Sample code for Hashed table Creation :
types:
begin of typ_pernr,
pernr like pa0001-pernr,
ename like pa0001-ename,
end of typ_pernr.

data:
ls_pernr type typ_pernr,
lt_pernr type hashed table of typ_pernr with unique key
pernr.
...
select pernr ename into table lt_pernr from pa0001.
...
loop at itab.
read table lt_pernr with table key pernr = itab-pernr
into ls_pernr.
write: ls_pernr-ename, itab-data.
endloop.

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