This week brought in some challenging tasks required from SQL partitioning…creating a view which mimics a GroupBy in Access.

In SQL, you use PARTITION to get a similar result set to a Group By query.  It will look something like this:

SELECT        *
FROM        (SELECT  *, ROW_NUMBER() OVER (PARTITION BY HASH ORDER BY DateSent desC) AS rn
from           (SELECT hash, survey_id, DateSent, DateCompleted
                      from dbo.tbl_survey_detail) as derivedtable) AS t
WHERE        t.rn = 1

As you can see above, a simple table with a few columns can be partitioned using one of the fields.  It is somewhat confusing to build one the first time, but the end result is quite quick and powerful.

Happy SQL coding!

Jeff Shirley

Jeff Shirley

Founder & CEO
Jeff brings over 27 years of experience to the table, along with numerous awards, certifications, and real-world implementations.  His database solutions are currently running in industries including government, mining, agriculture, finance, education, science, research, non-profits, and healthcare businesses around North America and serve thousands of users day to day.  Jeff is a five-time MVP Award recipient for Microsoft Access, acknowledging contributions to community projects, evangelism, and educational outreach on Microsoft technologies.  Today there are less than 50 Access MVP’s worldwide. While Jeff focuses day to day on business management, IoT development, IT integrations and design, database architecture or other typical complex tasks, he also is a co-owner of Blue Heron Gardens, a commercial apiary running over 200 beehives.  Fresh honey is a small perk for many of our clients!

Mitch Redekopp

Partner
Mitch works with our clients day to day ensuring web development and IT projects are done to exceed customer expectations.  His background includes formal training in IT, Microsoft and CompTIA certifications, real-world business experience, and a true dedication to ensuring clients receive timely and professional support on their projects with Rivercity Technology Services.  Given the most difficult requests for IT solutions, Mitchell can assist our clients in finding a path to the best options which deliver results for our clients.  Mitchell is an avid soccer player and Manchester City fan, be sure to talk soccer with him when you can.