Oracle PL/SQL中如何使用%TYPE和%ROWTYPE

   DECLARE
   
        DNAME DEPT.DNAME%TYPE; --动态的定义变量的类型，跟随着dept表中dname字段的类型变化而变化滴呀
        
   BEGIN
       SELECT DNAME INTO DNAME FROM DEPT WHERE DEPTNO=50;
       DBMS_OUTPUT.PUT_LINE(DNAME);
   END;
   

DECLARE
  V_ROW DEPT%ROWTYPE; --和dept表中的每一列数据类型都相同滴呀
  BEGIN
     SELECT * INTO V_ROW FROM DEPT WHERE DEPTNO=50;
     DBMS_OUTPUT.PUT_LINE(V_ROW.DNAME);
  END;