试题详情单项选择题Which constraint can be defines 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: WhatisthereIn which 在Oracle中，（）是一个基于Web的Which statemenYou need The transportaWhich of You are You need Which is an iSQL*PluYou need to change tIn an OrWhich setting enablehich of Given： Which sYou are Click the You are c下列哪个对象属于模式对象（）。 When you
