oracle pl sql while循环游标

DECLARE
CURSOR C_JOB IS SELECT EMPNO, ENAME, JOB, SAL FROM EMP WHERE JOB = 'MANAGER';
C_ROW C_JOB%ROWTYPE;
BEGIN
OPEN C_JOB;
FETCH C_JOB INTO C_ROW;
WHILE C_JOB%FOUND LOOP
DBMS_OUTPUT.put_line(C_ROW.EMPNO || '-' || C_ROW.ENAME || '-' || C_ROW.JOB || '-' || C_ROW.SAL);
FETCH C_JOB INTO C_ROW;
END LOOP;
CLOSE C_JOB;
END;

7566-JONES-MANAGER-2975
7698-BLAKE-MANAGER-2850
7782-CLARK-MANAGER-2450