Data Mining Part 32:The Microsoft Data Mining Enemies
In this chapter, we will talk about the competition of Data Mining
SQL and R
There is plenty that is novel and perhaps foreign to a new R user, but it's no reason to abandon your hard-earned SQL skills! In this article, Casimir Saternos explains that not only can you easily retrieve data from SQL Sources for analysis and visualisation in R, but you can also use SQL to create, clean, filter, query and otherwise manipulate datasets within R, using a wide choice of relational databases.
Version Control - Part 2 - Tracking Changes
Part 2 of Steve Jones' series on version control. This article examines how you can track the changes you have made in a development cycle.
Version Control - Part 3 - Migrating Objects to Production
Part 3 of Steve Jones' series on version control. This article examines how migrate your changes to your live systems.
Version Control - Part 4 - Rolling Back
Part 4 of Steve Jones' series on version control. This article examines how back out your changes from your live systems.
Version Control -Part 1- Dealing with Code
Part 1 of Steve Jones series on version control and SQL Server. This article examines how you can work with version control and SQL objects.
Follow-Up on Cursor Options
In this follow-up to a previous article, Aaron Bertrand reiterates that – while you should never just accept the defaults – you really should think about which options are most applicable to your scenario.
Shorten Audits, Tighten Security with Minion Enterprise
Minion Enterprise can help you with security management in an enterprise.
Automatic UNDO in Oracle
Automatic UNDO Management isn't voodoo or black magic, although it can seem that way when it isn't clearly understood. How does Oracle decide how many UNDO segments to create at startup, and what is the underlying goal of the process? David Fitzjarrell investigates.
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