mysql 查看大表,查看个表占用大小

use information_schema;


-- 查看 各库 占用 大小
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;

-- 查看某个库 各表 占用 情况
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 = ‘ku_ming‘
group by TABLE_NAME
order by data_length desc;

-- 查看 某个库 某个表 占用 情况
select table_name,concat(round(sum(data_length/1024/1024),2),‘MB‘) as data
from tables where table_schema=‘ku_ming‘
and table_name=‘tablename‘;