Oracle_Nested_Table1
Collections Type : Varrays,Nested tables,Associative arrays   (Index-By Tables)

The Nested tables are one-dimensional arrays which can be declared  as a column of an another table in the data base.

(DESCRIPTION=(ADDRESS_LIST=(ADDRESS=(PROTOCOL=TCP)(HOST=MANAS5)(PORT=1521)))(CONNECT_DATA=(SERVICE_NAME=orcl)))
Script:

SET SERVEROUTPUT ON;
CREATE OR REPLACE PROCEDURE m5_nested_proc1 AS
TYPE nested_table_type IS TABLE OF NUMBER ;
nested_table1 nested_table_type := nested_table_type (2);
BEGIN
nested_table1(1) := 10;
DBMS_OUTPUT.PUT_LINE('nested_table1(1) is '||nested_table1(1));
END m5_nested_proc1;
/
CALL m5_nested_proc1();