MySQL查询数据库和每个表所占空间大小

查询数据库占用磁盘空间：

select TABLE_SCHEMA, concat(truncate(sum(data_length)/1024/1024,2),'MB') as data_size, 
concat(truncate(sum(index_length)/1024/1024,2),'MB') as index_size 
from information_schema.tables 
group by TABLE_SCHEMA 
order by data_length desc;

查询数据库中所有表分别占用磁盘空间：

select TABLE_NAME, concat(truncate(data_length/1024/1024,2),'MB') as data_size, 
concat(truncate(index_length/1024/1024,2),'MB') as index_size 
from information_schema.tables where TABLE_SCHEMA = '你的数据库名称' 
group by TABLE_NAME 
order by data_length desc;