How to calculate the sum of values in a tree using SQL

Question

I need to sum points on each level earned by a tree of users. Level 1 is the sum of users\' points of the users 1 level below the user. Level 2 is the Level 1 points of the

Answer 1

I would say: create a stored procedure, probably has the best performance. Or if you have a maximum number of levels, you could create subqueries, but they will have a very poort performance.

(Or you could get MS SQL Server 2008 and get the new hierarchy functions... ;) )