PERSON

| id | name | age | city_id |
|:--- | ---------:| ---:| ---: |
| 1 | Alexey | 18 | 1 |
| 2 | Daria | 14 | 1 |
| 3 | Andrey | 33 | 2 |

CITY

| id | name |
|:-- |:-- |
|1 |Moscow |
|2 |St. Petersberg |