Oracle ref 动态游标：
create or replace procedure pro_cursor_type_V
as
t_tmp table3%rowtype;
type c_type is ref cursor;
cur c_type;
v_taname varchar2(100);
begin
v_taname:='aa';
open cur for 'select * from table3 where taname=:a order by taid desc' --a只是绑定变量的占位符以 =: 符号进行绑定
using v_taname;
dbms_output.put_line('名称有');
loop
fetch cur into t_tmp;
exit when cur%notfound;
dbms_output.put_line('名称为'||t_tmp.taname||'日期为：'||t_tmp.indate);
end loop;
end pro_cursor_type_V;