03 2022 档案

oracle程序块
摘要：1.匿名语句 DECLARE v_subject number := 0; BEGIN for v in (select id,sex,age from student) loop select count(*) into v_subject from subject where studentid 阅读全文
posted @ 2022-03-22 17:48 N神3 阅读(44) 评论(0) 推荐(0) 编辑