mysql 常用sql语句 二

• mysql 查询

• 基本查询

select * from users;

• 去重

select distinct(name),high from users order by high desc; ## 注意 distinct必须放在第一位，desc降序，distinct不会对结果进行排序
select * from users group by name; 

• 过滤

select * from users limit 3 order by desc;

• 聚合函数