查看每个数据库的磁盘占用大小

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

查看某个表磁盘占用大小

select TABLE_NAME, concat(truncate(data_length/1024/1024/1024,2),' GB') as data_size,
concat(truncate(index_length/1024/1024/1024,2),' GB') as index_size
from information_schema.tables where TABLE_SCHEMA = 'test'
group by TABLE_NAME
order by data_length desc;