如下：

查询（指定数据库/所有数据库）

select
table_schema as'数据库',
sum(table_rows) as'记录数',
sum(truncate(data_length/1024/1024,2)) as'数据容量(MB)',
sum(truncate(index_length/1024/1024,2)) as '索引容量(MB)'
from information_schema.tables
group by table_schema
order by sum(data_length) desc , sum( index_length) desc ;





查询（指定数据库/所有数据库）的各数据表容量/索引/行数 大小

select
table_schema as '数据库',
table_name as '表名',
table_rows as '记录数',
truncate(data_length/1024/1024,2) as '数据容量(MB)',
truncate(index_length / 1024/1024,2) as '索引容量(MB)'
from information_schema.tables
where TABLE_SCHEMA = '替换成你想查看的数据库名'
order by data_length desc , index_length desc ;