MySQL培训教程：MySQL数据库表的查询
最新学讯：近期OCP认证正在报名中，因考试人员较多请尽快报名获取最近考试时间，报名费用请联系在线老师，甲骨文官方认证，报名从速！
我要咨询MySQL数据库表的查询，参考表：student，包括id,name,sex,birth,department,address等几个字段，存在着一些数据，对这些数据进行相关的查询
多字段查询
MySQL> select id,name,birth from student;
所有字段查询
MySQL> select * from student;
where指定查询
MySQL> select * from student where id=901;
MySQL> select * from student where id>=904;
MySQL> select name from student where department='计算机系';
in指定集合查询
MySQL> select * from student where birth in(1988,1990);
MySQL> select * from student where id in(903,906);
not in非范围查询
MySQL> select * from student where birth not in(1990,1998);
between and指定范围查询
MySQL> select * from student where birth between 1986 and 1988;
not between and不在指定范围的查询
MySQL> select * from student where id not between 904 and 906;
like字符串匹配查询
MySQL> select * from student where name like '_三';
MySQL> select * from student where name like '张三';
MySQL> select * from student where name like '张%';
not like不匹配查询
MySQL> select * from student where name not like '张%';
null查询
MySQL> select * from student where address is null;
and多条件查询
MySQL> select * from student where name like '张%' and birth>1985;
MySQL> select * from student where name like '张%' and birth>1985 and id like '%3';
or多条件查询
MySQL> select * from student where id=905 or birth=1988;
MySQL> select * from student where id=905 or birth=1988 or sex='女';
distinct查询结果不重复
MySQL> select distinct sex from student;
MySQL> select distinct department from student;
order by查询结果排序
MySQL> select * from student order by birth;
MySQL> select * from student order by birth asc;
MySQL> select * from student order by birth desc;
group by分组查询
MySQL> select sex,group_concat(name) from student group by sex;
MySQL> select sex,count(name) from student group by sex;
正则表达式查询
MySQL> select * from student where birth regexp '1988|1990';
limit限制查询结果数量
MySQL> select * from student limit 2;
MySQL> select * from student limit 1,3;
