BetWeen和模糊查询--区分大小写性能比较低select * from Students where Age >1 and Age <4select * from Students where Age between 1 and 4--取出一到四的数据包含一和四(between在数据库有优化，性能比较好，高于上面的语句)select * from Students where Age in(1,2,3)--查询出年龄包含1,2,3的数据select * from Students where Name like 'a%' --以a开头的后面不管有几个字符都可以匹配select * from Students where Name like '_a%'--第二个字符是a的，_表示一个任意字符select * from Students where Name like '__a%' --前两个是任意字符，第三个是a字符的进行匹配select * from Students where Name like '%[0-9]%'--查询中间任何位置有数字的select * from Students where Name like '%[a-z]%'--查出中间任何位置有字母的select * from Students where Name like '%[0-9a-z]%'--查询中间任何位置有数字或字母的select * from Students where Name like '%[^0-9]%' --查询中间任何位置不是数字的select * from Students where Name like '%[^0-9]' --查询最后位置不是数字的select * from Students where Name not like '%[0-9]'