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Developer-C 11.1
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CREATE TABLE T( name VARCHAR(50), parent VARCHAR(50), hierarchy INT, value FLOAT ); INSERT INTO T VALUES ('A','A',1,100); INSERT INTO T VALUES ('B','A',2,0.5); INSERT INTO T VALUES ('C','B',3,0.5); ;with cte as( SELECT name,parent,hierarchy,value FROM T WHERE hierarchy = 1 UNION ALL SELECT t2.name,t2.parent, t1.hierarchy+1,t1.value * t2.value FROM CTE t1 join T t2 on t1.hierarchy+1 = t2.hierarchy WHERE t2.name <> t2.parent ) SELECT * FROM cte
name
parent
hierarchy
value
A
A
1
100
B
A
2
50
C
B
3
25