Запрос в базу данных

mysql -u saymon -p
mysql> show databases
    -> ;
+--------------------+
| Database           |
+--------------------+
| information_schema |
| saymondb           |
+--------------------+
2 rows in set (0.00 sec)


mysql> use saymondb
Reading table information for completion of table and column names
You can turn off this feature to get a quicker startup with -A


Database changed
mysql> show tables
    -> ;
+--------------------+
| Tables_in_saymondb |
+--------------------+
| class_categories   |
| classes            |
| history            |
| migration          |
| obj_prop_types     |
| object_properties  |
| objects            |
| relation_types     |
| relations          |
| state_history      |
| states             |
+--------------------+
11 rows in set (0.00 sec)


mysql> select count(id) from states;
+-----------+
| count(id) |
+-----------+
|         9 |
+-----------+
1 row in set (0.00 sec)