试题详情单项选择题Which constraint can be defined only at the column level?()A、UNIQUEB、NOT NULLC、CHECKD、PRIMARY KEYE、FOREIGN KEY正确答案:B答案解析:关注下方微信公众号,在线模考后查看热门试题Given: WhichtwostatOne of tGiven: What isTo view the results You are m()像表一样由列组成,其查询方式与表相同In RMAN, Which are&ensp You execute the folYou want 当需要删除某个序列seq_customeWhat is true of usin为了减少表中的链接记录和迁移记录,应当增 A UNIX us An RMAN bWhich option is best Sales details&View the En your pYou executed