发布于 2016-04-07 06:45:00 | 151 次阅读 | 评论: 0 | 来源: 网友投递

这里有新鲜出炉的Mysql教程，程序狗速度看过来！

Mysql关系型数据库管理系统

MySQL是一个开放源码的小型关联式数据库管理系统，开发者为瑞典MySQL AB公司。MySQL被广泛地应用在Internet上的中小型网站中。由于其体积小、速度快、总体拥有成本低，尤其是开放源码这一特点，许多中小型网站为了降低网站总体拥有成本而选择了MySQL作为网站数据库。

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本篇文章介绍了，在mysql中基本查询的应用详解。需要的朋友参考下

参考表：student

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;