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
Database AI Agents: The Read-Only Rule
By Arun Sirpal
Fourth in a series on Ai and databases. What Read-Only Advisory Actually Means A...
Creating a SQL Stored Procedure to Load a SCD2
By DataOnWheels
This is a blog that I am writing for future me and hopefully it’ll...
Funny Money: #SQLNewBlogger
By Steve Jones
While wandering around the documentation looking for some Question of the Day topics, I...
Forums
Pro SQL Server Internals
Comments posted to this topic are about the item Pro SQL Server Internals
SQL ART: Who's Blocking Who? Visualising SQL Server Blocking With Spatial Geometry
Comments posted to this topic are about the item SQL ART: Who's Blocking Who?...
Running SQLCMD II
Comments posted to this topic are about the item Running SQLCMD II
Question of the Day
Running SQLCMD II
I run this command to start SQLCMD:
sqlcmd -S localhost -E -c "proceed"At the prompt, I type this (the 1> and 2> are prompts):
1> select @@version 2> goWhat happens? See possible answers