MySql 数据库查询使用空间

mysql> show databases;
+--------------------+
| Database           |
+--------------------+
| information_schema |
| mysql              |
| performance_schema |
| sys                |
| yzsaas             |
+--------------------+
5 rows in set

mysql> use information_schema;
Database changed
mysql> select sum(data_length/1024/1024) as data from tables where table_schema='yzsaas';
+-------------+
| data        |
+-------------+
| 16.06250000 |
+-------------+
1 row in set

mysql> select concat(round(sum(data_length/1024/1024),2),'mb') as data from tables where table_schema='yzsaas';
+---------+
| data    |
+---------+
| 16.06mb |
+---------+
1 row in set

mysql>