Join Operations – Hash Match
The way in which SQL Server chooses to join your tables in a query can dramatically affect performance. In this article, Jason Brimhall explains how a hash match works and shows some performance numbers.
The SQL Server 2016 Query Store: Analyzing Query Store Performance
There are some obvious advantages to having the Query Store, but what is the performance impact that it is likely to have on a busy OLTP database server? It is early days, of course and until we get more experience we have to rely on Microsoft's estimate of a performance impact of 3-5% on average. However, this will depend on a number of factors such as usage an the way it is configured. Enrico explores some of these factors in order to give a clearer picture of what you should expect.
Adding PK Exceptions to SQLCop Tests
In this piece, Steve Jones shows how you can enforce a requirement of a Primary Key (PK) with a unit test, but also allow exceptions where needed.
Solving Tempdb Issues
A simple change might solve some of those tempdb issues various customers experience.
Performance Surprises and Assumptions : DATEADD()
Aaron Bertrand explores yet another scenario where a date/time function seems to cause the optimizer to behave unexpectedly.
Use Tools
One of the great things about IT is that we have so many tools to help us do our jobs. We can even build tools as needed. So why don't more IT people take advantage of this?
A Lifetime of Software
Today Steve Jones wants you to look forward in your career. Do you enjoy working with software and technology? Do you plan on doing this for the rest of your career?
Data Mining Part 40: Big Data and Microsoft Data Mining
This article will introduce about big data and HDInsight and Hadoop.
Blogs
Five Ways Redshift Serverless Quietly Eats Your Budget
It is Friday, the queries are running, and nobody is watching the bill. That...
A Career of Memories
By Steve Jones
Annabel retired from Redgate Software this week. Across most of my career at Redgate,...
Rethinking Index Maintenance: Why avg_fragmentation_in_percent Is Outdated and What You Should Do Instead
By Tim Radney
As a SQL Server DBA with years of experience tuning production environments, I’ve seen...
Forums
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Question of the Day
BCP on Linux
When running bcp on Linux, what is the field terminator?
See possible answers