摘要: (1).第一类:create view v as select * from table; (2).第二类:create view v as select id,name,age from table; (3).第三类:create view v[vid,vname,vage] as select 阅读全文
posted @ 2019-01-05 17:44 方白逸 阅读(10681) 评论(2) 推荐(1) 编辑