Oracle PLSQL Demo - 08.定义显式游标[Define CURSOR, Open, Fetch, Close CURSOR]

declare

    v_empno scott.emp.empno%type;

    v_sal   scott.emp.sal%type;

    cursor cur_emp is

        select t.empno, t.sal from scott.emp t;



begin



    open cur_emp;



    loop

        fetch cur_emp

            into v_empno, v_sal;

    

        exit when cur_emp%notfound;

    

        dbms_output.put_line(v_empno || '   ' || v_sal);

    

    end loop;



    close cur_emp;



end;