Question

I’m using SQL Server 2008.

I have a table with x amount of rows. I would like to always divide x by 5 and select the 3rd group of records.

Let’s say there are 100 records in the table:

100 / 5 = 20

the 3rd segment will be record 41 to 60.

How will I be able in SQL to calculate and select this 3rd segment only?

Thanks.

Answer 1

You can use NTILE.

Distributes the rows in an ordered partition into a specified number of groups.

Example:

SELECT col1, col2, ..., coln
FROM
(
    SELECT
        col1, col2, ..., coln,
        NTILE(5) OVER (ORDER BY id) AS groupno
    FROM yourtable
)
WHERE groupno = 3