【单选题】It rains cats and dogs.
【单选题】It rains cats and dogs.
【判断题】SELECT sno, cno from SC x where Grade>=(select avg(grade) from SC y where y.sno=x.sno) 该语句为非相关子查询
【简答题】查询最低分数大于 18002号学生的最低分数的学生学号和课程代码。 select sno,cno from sc group by sno having ()(grade)>(select min(grade) from sc where sno='18002')
【简答题】it rains cats and dogs
【单选题】现要查找缺少学习成绩G的学生学号Sno和课程号Cno,相应的SQL语句SELECT、Sno,Cno FROM SC WHERE…中,WHERE后正确的条件表达式是( )。
【简答题】It rains cats and dogs.
【简答题】it rains cats and dogs