查询Mysql数据表使用的内存大小

SQL语句如下:

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_size desc;
#order by data_length desc;