1、进入information_schema 数据库(存放了其他的数据库的信息)
use information_schema;
2 查询某个数据库的大小例如zabbix
select concat(round(sum(data_length/1024/1024),2),'MB') as data from tables where table_schema='zabbix';
+---------+
| data |
+---------+
| 21.28MB |
+---------+
1 row in set (0.01 sec)
3、查询所有数据的大小:
select concat(round(sum(data_length/1024/1024),2),'MB') as data from tables;
4、查看指定数据库的某个表的大小
比如查看数据库home中 members 表的大小
select concat(round(sum(data_length/1024/1024),2),'MB') as data from tables where table_schema='home' and table_name='members';