2018-03-12
307 reads
David Poole
- Interests: Badminton, Cycling and Music. Keen piano player.
The Power of the Data Model
A data model is far more powerful than simply a set of build instructions for DBAs. It can be used to shape business thought and actions for the benefit of all.
2017-02-14
2,028 reads
Bash for ETL pre-processing
People were doing ETL long before ETL packages were invented. Some of those facilities still have worth today
2016-08-15
6,597 reads
Data Quality - Addressing non-stated requirements
Producing a crib sheet for data quality drives a shared understanding of the data used to power the business.
2016-07-28
1,331 reads
RANDom traps for the unwary
The Books Online description of the RAND() function is only true from certain perspectives.
2016-05-09
2,739 reads
What’s in a name?
When a business does not have an agreed set of definitions for their every day terms slow burning chaos ensues.
2016-05-04
108 reads
Getting ready for Hadoop
Before adopting Hadoop into your organisation there are a number of factors to consider. This article highlights some of the key points.
2015-11-23
6,386 reads
Deploying tech to the cloud
There is a world of difference between technology originating in or designed for the cloud and technology that predates but can run in the cloud.
2015-10-12
126 reads
Soundex - Experiments with SQLCLR Part 2
Constructive feedback on SOUNDEX - Experiments with SQLCLR lead to further experimentation with phonetic algorithms
2015-07-06
3,848 reads
A Beginners Look at Hadoop
Hadoop has been making a lot of noise in the Big Data world. Despite my lack of Linux experience I decided to take the plunge and this is what I found.
2015-01-01 (first published: 2013-06-05)
24,190 reads
Blogs
Automatic Index Compaction
By ReviewMyDB
Index maintenance has always meant nightly jobs and a window you have to defend....
The Goldilocks problem – Materialized Views
I’m sure you’ve all heard the tale of Goldilocks and the Three Bears, but...
Monday Monitor Tips: Virtual Machine Usage and Cost
By Steve Jones
One of the things I’ve been requesting for a number of years is cost...
Forums
SQL Art, Part 4: Happy 4th of July — A British DBA's Guide to Celebrating a War We Don't Talk About
Comments posted to this topic are about the item SQL Art, Part 4: Happy...
How We Handled a Vendor Retry That Loaded Twice in Snowflake
Comments posted to this topic are about the item How We Handled a Vendor...
Cognitive Coverage
Comments posted to this topic are about the item Cognitive Coverage
Question of the Day
Getting the Average
I have this data in the dbo.Commission table in a SQL Server 2022 database.
salesperson commission Brian 12 Brian 16 Andy 7 Andy 14 Andy 21 Steve 20 Steve NULLAll the data is a varchar, and I decide to run this query to get the totals for each salesperson.
SELECT SalesPerson
, AVG(TRY_PARSE(Commission AS int)) AS TotalCommission
FROM commission
GROUP BY SalesPerson
GO
What average commission is calculated for Steve? See possible answers