MariaDB [(none)]> SELECT table_schema "DB Name", Round(Sum(data_length + index_length) / 1024 / 1024, 1) "DB Size in MB"
 FROM information_schema.tables
 GROUP BY table_schema;
+--------------------+---------------+
| DB Name            | DB Size in MB |
+--------------------+---------------+
| hope               |       75714.0 |
| information_schema |           0.2 |
| mysql              |           1.9 |
| performance_schema |           0.0 |
+--------------------+---------------+