Prevent Confidential Data at the Application Layer from getting into SQL Server
In this tip Tim Smith looks at different approaches to stop confidential data from getting into the database.
Hierarchies on Steroids #1: Convert an Adjacency List to Nested Sets
SQL Server MVP Jeff Moden shows us a new very high performance method to convert an "Adjacency List" to “Nested Sets” on a million node hierarchy in less than a minute and 100,000 nodes in just seconds. Not surprisingly, the "steroids" come in a bottle labeled "Tally Table".
No Compelling Reason
Steve Jones wants to know if you have compelling reasons to upgrade or not upgrade this week.
A TDD Journey: 3- Mocks vs. Stubs; Test Frameworks; Assertions; ReSharper Accelerators
Test-Driven Development (TDD) involves the repetition of a very short development cycle that begins with an initially-failing test that defines the required functionality, and ends with producing the minimum amount of code to pass that test, and finally refactoring the new code. Michael Sorens continues his introduction to TDD by implementing the first tests and introducing the topics of Test doubles; Test Runners, Constraints and Assertions.
Data Mining Part 17: Working with Reports
In this chapter, we will learn how to create Data Mining Reports using Reporting Services.
Data Mining Part 17: Working with Reports
In this chapter, we will learn how to create Data Mining Reports using Reporting Services.
The 10 (.5) Commandments for IT Professionals
A list of the commandments, or at least suggestions, that Simon Holzman sees as important for IT professionals.
Azure Virtual Machines Part 0: A VM Primer
Mike Martin kicks off his series on Azure Virtual Machines with a primer, full of background and terms. To fully understand the Azure Virtual Machines offering, Mike explains how everything is connected and co-existing.
A Dearth of Comments
Steve Jones talks about one of the least favorite things for IT people: documentation. How much do you really need to do?
The Mindset of the Enterprise DBA: Harnessing the Power of Automation
After you have done the necessary groundwork of standardising and centralising your database adminstration processes, you are now in a position to implement some effective automation of some of these processes. Which ones do you choose, and how do you set about automating these tasks?
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