查询MySQL表空间/所有大小

select 
    round(sum(DATA_LENGTH/1024/1024), 2) as data_size, 
  round(sum(DATA_LENGTH/1024/1024), 2) as index_size, 
  round(sum((DATA_LENGTH + INDEX_LENGTH)/1024/1024), 2) as total_size, 
  "MB" as unit 
from information_schema.TABLES 
where table_schema='virtual' and table_name='tb_orders';