Question

I have a table with 2 columns:

select product, quantity from datainformation

this table returns:

product quantity
1        10
2        30
4        23
191      10
900       1
1234      5
12345     2

1. two columns are int.
2. table could to have N records

I need to get 2 Strings for EVERY 50 records. My question is how to get these strings:

stringproducts='1    2    4    191  900  1234 12345'
stringquantity='10   30   23   10   1    5    2    '

Now I need these strings for every 50 records so, for example, if I have 51 records I need
my second “block” to have the last product and the last quantity.

In another language I could use ltrim(cad,5). How would I do this in SQL?

Can I use stuff for this? Or do I need a loop and concatenate them 1 for 1?
I believe with a stuff it could be easier (maybe a stuff inside a loop but it would be easier a loop for every record)

Answer 1

You can use FOR XML PATH and STUFF():

select 
  stuff((
        select ' ' + cast(product as char(10))
        from datainformation
        for XML path('')),1,1,'') as products,
 stuff((
        select ' ' + cast(quantity as char(10))
        from datainformation
        for XML path('')),1,1,'') as quantity

See SQL Fiddle with Demo