mysql SQL命令查看Mysql数据库磁盘使用量

– 1. 查询所有数据总的磁盘使用量：

select concat(round(sum(data_length/1024/1024),2),'MB') as data 
from information_schema.tables;

– 2. 查看所有数据库实例的磁盘占用情况

 select       table_schema     ,concat(round(sum(data_length/1024/1024),2),'MB') as data  from information_schema.tables    group by table_schema;

– 4.查看指定数据库的大小，例如数据库zabbix：

select concat(round(sum(data_length/1024/1024),2),'MB') as data 
from information_schema.tables 
where table_schema='zabbix';