Visitation model 2
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Visitation model 1
Visitation model 3
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
