bfa, PostgreSQL - rextester

bfa

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id_apartment
floor
id_building

1
1
0
1

2
2
0
1

3
3
0
1

4
4
1
1

5
5
1
1

6
6
1
1

7
7
2
1

8
8
2
1

9
9
0
2

10
10
1
2

11
11
1
2

12
12
2
2

13
13
2
2

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