mysql查看当前所有的数据库和索引大小


 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;




 mysql查看当前某个数据库和数据库下所有的表的大小


 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 = 'mysql'
 group by table_name
 order by data_length desc;