Comments on: Building Ranges using T-SQL http://www.sql-server-performance.com/2011/building-range-using-t-sql/ SQL Server Performance Tuning Fri, 17 May 2013 13:31:24 +0000 hourly 1 http://wordpress.org/?v=3.5.1 By: James Tolputt http://www.sql-server-performance.com/2011/building-range-using-t-sql/#comment-1052 James Tolputt Mon, 19 Dec 2011 12:20:12 +0000 http://www.sql-server-performance.com/?p=2679#comment-1052 If you’re going to use CTE’s it would be easier/more readable to create an aggregate table rather than use recursion:

with runaggs as (
select
p1.Prod_ID,
rtot = isnull(sum(p2.Prod_Qty), 0)
from product p1
left join product p2
on p2.Prod_ID < p1.Prod_ID
group By p1.Prod_ID
)
select p.Prod_ID, p.Prod_Name, p.Prod_Qty, rtot,
MinID = case when Prod_Qty = 0 then null else rtot+1 end,
MaxID = case when Prod_Qty = 0 then null else rtot+Prod_Qty end
FROM product p
inner join runaggs r on r.Prod_ID = p.Prod_id

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