Question

I have a records like this:

start, end , total  
 830 , 1300,   5
 1400, 1430,   2

that I’d like to expand to:

instance , total  
  830    ,   5
  831    ,   5
  832    ,   5
  ...
  1299   ,   5
  1300   ,   5

  1400   ,   2
  1401   ,   2
  ...
  1429   ,   2
  1430   ,   2

How can I do this using SQL in MSSQL 2005?

EDIT: thanks everyone, great answers. Got a few to work. I just forgot to say though that the start/end was really a time stored as an int, so 0830 to 1300 should go upto 0859 then 0900. I can’t expect you guys to answer that in this same question, i’ll work around it. Thanks again

Answer 1

Using a CTE:

with number_cte(n) as 
 (select n from (select 0 n) m union all select n+1 n
  from number_cte where n< 2400)
select start+n instance, total
from 
datatable
join number_cte on start+n between start and [end]
where start+n - 100*floor((start+n)/100) between 0 and 59
order by 1
option (maxrecursion 2401)

(Increase n< … and maxrecursion numbers as appropriate, if ranges greater than 2400 are required.)

Edited to prevent non-valid Instance (ie. time values ending between 60 and 99) values being included.