Question

I have a table named A. it has only one record with one field. It is an integer named number.
I want to create a view that have A.number records, each are one of the numbers less than A.number.

For example:

select A.number —–> 5

the view should show 5 records 0 1 2 3 4

P.S: This is a real problem that I simplified it a lot. The real problem is like dividing a budget in a fixed period to each day.

Answer 1

This sounds a bit like it might be homework, so I’m wary of providing the code outright.

I can give a pointer for how to solve the question, though. You use a recursive CTE where each iteration adds one to the previous iteration. Just be sure to set the MAXRECURSION option if you’ll be checking numbers > 101. You can use a scalar sub query to key the view to the original table:

---

WITH numbers ( n ) AS (
    SELECT 0 UNION ALL
    SELECT 1 + n FROM numbers WHERE n < (select number from a) -1)
SELECT n FROM numbers
OPTION ( MAXRECURSION 500) --example