环境

centos7，mysql5.7

查看各个数据库大小

select 
table_schema database_name,
sum(table_rows) row_s,
sum(truncate(data_length/1024/1024/1024, 2)) data_GB,
sum(truncate(index_length/1024/1024/1024, 2)) index_GB
from information_schema.tables
group by table_schema
order by sum(data_length) desc, sum(index_length) desc;

查看库中各个表大小

 select 
table_schema database_name,
table_name as table_name,
table_rows as row_s,
truncate(data_length/1024/1024, 2) data_MB,
truncate(index_length/1024/1024, 2) index_MB
from information_schema.tables
order by data_length desc, index_length desc;