数据加中的集合
create of replace type table_name is table of data_type

TYPE t_indexTable IS TABLE OF emp%ROWTYPE NOT NULL INDEX BY BINARY_INTEGER;
v_indexTable t_indexTable;
CURSOR v_cur IS
SELECT * FROM emp;
BEGIN
FOR c IN v_cur LOOP
v_indexTable(c.empno):=c;
IF v_indexTable.EXISTS(c.empno) THEN
DBMS_OUTPUT.PUT_LINE(‘v_indexTable(‘||c.empno||’).empno=’ || c.empno
||’;v_indexTable(‘||c.empno||’).ename=’||c.ename);
ELSE
DBMS_OUTPUT.PUT_LINE(‘v_indexTable(‘||c.empno||’):不存在’);
END IF;
END LOOP;
END;

表类型的下标不一定是连续的,所以可以删除某个下标值,数组类型不行.