是这样? create view test_v as select title,content from a union all select title,content from b union all select title,contentfrom c
发表于:2007-03-27 14:53:273楼 得分:15
create view test_v as select title,content '来自a ' as type as from a union all select title,content, '来自b ' from b union all select title,content, '来自c ' from c