External Article

Statistics in SQL: Student’s t-test

Many undergraduates have misunderstood the name 'Students' in the t-test to imply that it was designed as a simple test suitable for students. In fact it was William Sealy Gosset, an Englishman publishing under the pseudonym Student, who developed the t-test and t distribution in 1908, as a way of making confident predictions from small sample sizes of normally-distributed variables. As Gosset's employer was Guinness, the brewer, Phil Factor takes a sober view of calculating it in SQL.

External Article

Network Configuration of SQL Server Always On Availability Groups in Azure

Implementing SQL Server Failover Clustering in Azure virtual machines differs in several aspects from its on-premises implementations. These differences reflect some of the unique characteristics of the storage and network infrastructure services in the Microsoft cloud environment. In this article, Marcin Policht looks at the networking aspects of clustered deployments of SQL Server 2016 in Azure.

External Article

Automated Database Provisioning for Development and Testing

If your development team needs to work on anonymised copies of the current production database, and if changes are being delivered rapidly as well, that could mean a lot of time and routine DevOps work copying databases. SQL Clone was designed for tasks like this. Grant Fritchey investigates whether you save time, effort and scripting over the more traditional approach, and at what point it makes sense to use it.

SQLServerCentral Editorial

The Achilles Heel

In a long career in IT, Phil Factor cannot recall a 'major incident', where the failure or breach was due to a single 'Achilles Heel', or even a single team of people. They are always due to a whole plethora of slack and ignorant practices.

Blogs

From Planning to Practice: Setting Up Your FinOps Framework

By

As someone who works in DevOps, I’m always focused on creating systems that are...

“We love to debate minutiae”

By

I am guilty as charged. The quote was in reference to how people argue...

Advice I Like: Knots

By

Learn how to tie a bowline knot. Practice in the dark. With one hand....

Read the latest Blogs

Forums

Restoring On Top II

By Steve Jones - SSC Editor

Comments posted to this topic are about the item Restoring On Top II

SQL Art 2: St Patrick’s Day in SSMS (Shamrock + Pint + Pixel Text)

By Terry Jago

Comments posted to this topic are about the item SQL Art 2: St Patrick’s...

Breaking Down Your Work

By Steve Jones - SSC Editor

Comments posted to this topic are about the item Breaking Down Your Work

Visit the forum

Question of the Day

Restoring On Top II

I have a database, DNRTest, that has a number of tables and other objects in it. The other day, I was trying to mock up a test and ran this code on the same server: 

-- run yesterday
CREATE DATABASE DNRTest2
GO
USE DNRTest2
GO
CREATE TABLE NewTable (id INT)
GO
Today, I realize that I need a copy of DNRTest for another mockup, and I run this: 
-- run today
USE Master
BACKUP DATABASE DNRTest TO DISK = 'dnrtest.bak'
GO
RESTORE DATABASE DNRTest2 FROM DISK = 'dnrtest.bak' WITH REPLACE
What happens?

See possible answers