要想知道每个数据库的大小的话,步骤如下:

进入 information_schema 数据库

use information_schema;

查询所有数据的大小:

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

查看数据库home的大小:

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

查看数据库 homemembers 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';