Visitation:
Stored as:
| Id | Parent | Name | Left | Right |
|---|---|---|---|---|
| 3 | 1 | Countries | 1 | 12 |
| 4 | 3 | Belgium | 2 | 3 |
| 5 | 3 | Netherlands | 4 | 9 |
| 6 | 3 | Germany | 10 | 11 |
| 7 | 5 | Business | 5 | 6 |
| 8 | 5 | Economy | 7 | 8 |