mysql 查询——逻辑查询

 --去重查询 distinct
 select distinct gander from student;

 --逻辑查询
    and or not
    --查询18-28之间的数据
    select *from student age>18 and age<28;
    --查询age大于18的女性
    select *from student age>18 and name="lady";
    --多条件查询
    select * from student where age>10 and gender="man" and high>150;

    --查询不是age大于18的女性  not
    select *from student not (age>18 and name="lady");