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select * from (values (100, 1, 0, 'X'), (200, 2, 0, 'Y'), (150, 0, 100, 'X.1'), (300, 0, 200, 'Y.1')) v(ID, ord, parent, name) order by (case when parent = 0 then id else parent end), ord desc;
ID
ord
parent
name
100
1
0
X
150
0
100
X.1
200
2
0
Y
300
0
200
Y.1