单项选择题
A.由Key定义的索引B.由Union定义的索引C.由Unique定义的索引D.由Index定义的索引
A.SELECT *FROM student where id!=2,3,4,5;B.SELECT *FROM student where id not between 5 and 2;C.SELECT *FROM student where id not between 2 and 5;D.SELECT *FROM student where id not in 2,3,4,5;
A.一行B.两行C.三行D.多行