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

If you were using Oracle DBMS that would be pretty straightforward since Oracle supports tree queries with the CONNECT BY/STARTS WITH syntax. For SQL Server I think you might find Common Table Expressions useful