oracle 游标

set serveroutput on

DECLARE

  CURSOR cemp is select ename ,sal from emp ;
  pename emp.ename%TYPE ;
  psal emp.sal%TYPE ;

  BEGIN

  OPEN cemp;
  LOOP
    FETCH  cemp INTO pename,psal;
    EXIT  WHEN cemp%notfound;

    dbms_output.put_line(pename||'的薪水是'||psal);

  END LOOP;


  CLOSE cemp;
END;

set serveroutput on

DECLARE

  CURSOR cemp is select empno ,job from emp ;
  pempno emp.empno%TYPE ;
  pjob emp.job%TYPE ;

  BEGIN

  OPEN cemp;
  LOOP
    FETCH  cemp INTO pempno,pjob;
    EXIT  WHEN cemp%notfound;

   if pjob='PRESIDENT'  then update emp set sal=sal+1000 where empno=pempno;
    elsif pjob='MANAGER'  then update emp set sal=sal+8000 where empno=pempno;
     else  update emp set sal=sal+5000 where empno=pempno;
end if;
  END LOOP;


  CLOSE cemp;
  
  commit;
END;



select  * from emp

set serveroutput on

DECLARE

  CURSOR cemp(dno number) is select ename  from emp where  empno=dno;
  pename emp.ename%TYPE ;
 

  BEGIN

  OPEN cemp(10);
  LOOP
    FETCH  cemp INTO pename;
    exit when cemp%notfound;
    dbms_output.put_line(pename);
  END LOOP;



  CLOSE cemp;
 
END;