摘要: 创建试图create view sex_st (视图名称)asselect xb,count(sex) as renshu from dangan group by(sex); 查询视图select * from sex_st; 修改视图select xb,count(sex) as renshu 阅读全文
posted @ 2017-12-29 16:39 Leonardo-li 阅读(123) 评论(0) 推荐(0) 编辑