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;