Recursive Query
The code for the Adjacency List Model is actually worse than the Nested Sets Model. IF YOU DO IT RIGHT. Sit down and write constraints to prevent these commonSingle root of the tree: since the lft and...
View ArticleRecursive Query
Construct hierarhy path instead of sum.declare @BOM table( id int ,parentId int ,qty float ) insert @BOM values ( 20,10,2) ,(25,10,3) ,(30,20,5) ,(30,25,7) ,(40,30,11) ;with cte as( select [parentId]...
View ArticleRecursive Query
Thanks for the response, I guess, but trying to sell me your book isn't all that helpful.
View ArticleRecursive Query
ks for the reply but that doesn't answer my question about the sort order.I can do the SUMing, etc, but the sorting is killing me.
View ArticleRecursive Query
Get as copy of TREES & HIERARCHIES IN SQL and read the sections of BOM. It uses the Nested Sets model and will run a lot better than what you are trying to do. --CELKO-- Books in Celko Series for...
View ArticleRecursive Query
Recursive CTE is powerfull tool for bill of material calculations. The query below calculates total parts, needed for top-level assembliesdeclare @BOM table( id int ,parentId int ,qty float ) insert...
View ArticleRecursive Query
Thanks Tom! That is (nearly) perfect.Using that documentation I have been able to write the CTE and have the data I'm looking for.I am still struggling with the sorting/presentation of the data....
View ArticleRecursive Query
You want to use a recursive cte. A good description and example can be found in BOL athttp://msdn.microsoft.com/en-us/library/ms186243.aspx.Tom
View ArticleRecursive Query
I'm trying to find the most efficient query to do a recursive query for exploding a bill of materials.Specifically, I have a table like:Parent Component Field1 (etc)I select all of the components for a...
View Article
