Articles

Technical Article

Temporal Data Part 3 – Reporting Out Current and Historical Information

With the introduction of temporal table support in SQL Server 2016 Microsoft also added some additional functionality that makes it easy for you to join the current and history records of a system-versioned table. Greg Larsen shows you some of the different ways to do analysis of your system-versioned records over time.

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2016-08-31

4,554 reads

External Article

Formatting SQL Code - Part the Second

When you're formatting SQL Code, your objective is to make the code as easy to read with understanding as is possible, in a way that errors stand out. The extra time it takes to write code in an accessible way is far less than the time saved by the poor soul in the future, possibly yourself, when maintaining or enhancing the code. There isn't a single 'best practice, but the general principles, such as being consistent, are well-established. Joe Celko gives his take on a controversial topic.

2016-08-30

8,612 reads

External Article

SQL Server Access Control: The Basics

No technology yet invented can in any way allow us to neglect the task of ensuring the security of the database by controlling access. Security must be applied in depth, and the database is designed provide a system that will thwart even the most determined external attack. If it seems a bit complicated at first, that is no longer an excuse now that Rob Sheldon has provided this simple guide for getting started.

2016-08-25

8,113 reads

Technical Article

Installing Master Data Services in an AlwaysOn Environment

This article describes a solution for Master Data Service (MDS) hosted on AlwaysOn Availability Group configuration. The article describes how to install and configure SQL 2016 Master Data Services on a SQL 2016 AlwaysOn Availability group (AG). The main purpose of this solution is to improve high availability and disaster recovery of MDS backend data hosted on a SQL Server database.

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2016-08-24

4,157 reads

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The Empty Aggregate

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Question of the Day

The Empty Aggregate

I have this table in a SQL Server 2025 database:

CREATE TABLE [dbo].[CustomerOrder]
(
[OrderID] [int] NULL,
[CustomerID] [int] NULL,
[total] [money] NULL
) ON [PRIMARY]
GO
What is returned from this code? (answers are for the sum and then the count)
SELECT SUM(total) AS sum,
       COUNT(total) AS count
FROM dbo.CustomerOrder;



See possible answers