Oracle array

---- Single array
--sample 1
DECLARE
TYPE emp_ssn_array IS TABLE OF NUMBER
INDEX BY BINARY_INTEGER;

best_employees emp_ssn_array;
worst_employees emp_ssn_array;

BEGIN
best_employees(1) := '123456';
best_employees(2) := '888888';

worst_employees(1) := '222222';
worst_employees(2) := '666666';

FOR i IN 1..best_employees.count LOOP
DBMS_OUTPUT.PUT_LINE('i='|| i || ', best_employees= ' ||best_employees(i)
|| ', worst_employees= ' ||worst_employees(i));
END LOOP;

END;


--sample 2
DECLARE
TYPE ref_des IS TABLE OF varchar2(20) INDEX BY BINARY_INTEGER;
ind_des ref_des;
BEGIN
ind_des(1) := 'C1';
ind_des(2) := 'C2';
FOR i IN ind_des.first..ind_des.count LOOP
DBMS_OUTPUT.PUT_LINE('i='|| i || ', ind_des= ' || ind_des(i));
END LOOP;
END;

-- n D array
DECLARE

TYPE emp_type IS RECORD
( emp_id employee_table.emp_id%TYPE,
emp_name employee_table.emp_name%TYPE,
emp_gender employee_table.emp_gender%TYPE );

TYPE emp_type_array IS TABLE OF
emp_type INDEX BY BINARY_INTEGER;

emp_rec_array emp_type_array;
emp_rec emp_type;

BEGIN
emp_rec.emp_id := 300000000;
emp_rec.emp_name := 'Barbara';
emp_rec.emp_gender := 'Female';

emp_rec_array(1) := emp_rec;

emp_rec.emp_id := 300000008;
emp_rec.emp_name := 'Rick';
emp_rec.emp_gender := 'Male';

emp_rec_array(2) := emp_rec;

FOR i IN 1..emp_rec_array.count LOOP
DBMS_OUTPUT.PUT_LINE('i='||i
||', emp_id ='||emp_rec_array(i).emp_id
||', emp_name ='||emp_rec_array(i).emp_name
||', emp_gender = '||emp_rec_array(i).emp_gender);
END LOOP;

END;