Statistics and the Ascending Key Problem
I’ve mentioned previously how not having up to date statistics can cause problems in query performance. This post looks at something called the Ascending Key Problem which can badly...
2021-02-09
178 reads
Matthew McGiffen DBA
What are Statistics in SQL Server?
Statistics are vitally important in allowing SQL Server to find the most efficient way to execute your queries. In this post we learn more about them, what they are...
2021-03-24 (first published: 2021-02-01)
397 reads
Rowcount estimates when there are no Statistics
When you don't have statistics, what does SQL use to calculate the estimated number of rows?
2021-02-04 (first published: 2021-01-26)
292 reads
When do Statistics get updated?
Statistics objects are important for allowing the SQL Server Optimizer to make good estimates and form efficient execution plans. Related to that it's useful for us to understand when...
2021-01-25 (first published: 2021-01-18)
497 reads
How does Query Store capture cross database queries?
Query Store is a configuration that is enabled per database, and the plans and stats for queries executed in that database are stored in the database itself. So what...
2021-01-18 (first published: 2021-01-11)
468 reads
Identify the (Top 20) most expensive queries across your SQL Server using Query Store
Script to identify the most expensive queries on your database server using the Query Store DMVs. This allows you to look at data from a specific time frame, as...
2021-01-11 (first published: 2021-01-04)
691 reads
SQL Puzzle – Eight Queens on a Chess board
Here's a SQL Puzzle for the festive period. 2020 has been a year of many things but amongst it all, it has been the year of chess. The combined...
2020-12-24 (first published: 2020-12-15)
533 reads
Introduction to SQL Server Query Store
Introduced with SQL 2016, Query Store was, probably without doubt, the most anticipated and talked out new feature. In this post we'll just take a brief look at it,...
2020-12-21 (first published: 2020-12-14)
926 reads
TDE in Standard Edition on SQL 2019
Recently Microsoft quietly let us know that TDE (Transparent Data Encryption) will be available in the Standard Edition of SQL Server 2019. If you don’t follow SQL topics on...
2019-11-12 (first published: 2019-11-05)
7,113 reads
Why Does Everyone Have More Friends Than You?
No, the answer isn’t because you’re a DBA. This isn’t a technical post about databases, but rather a discussion of a statistical paradox that I read about recently. Statistics...
2019-10-01
38 reads
Blogs
Scooby Dooing Episode 10: The Case of the Copy-and-Paste Consultant
Every Scooby-Doo episode has one thing in common — there’s always a fake ghost....
Regression Testing: DAX User Defined Functions
User Defined Functions is a new feature in PowerBI currently in public preview. There...
The fundamental requirements of a reporting system
By ChrisJenkins
There are some fundamental boxes that your reporting system must tick. ✅ The figures...
Forums
Data > Hype
Comments posted to this topic are about the item Data > Hype
Create and Read the Analysis Services Flight Recorder
Comments posted to this topic are about the item Create and Read the Analysis...
Slipstream parameters
Comments posted to this topic are about the item Slipstream parameters
Question of the Day
Slipstream parameters
What parameters are needed to enable a slipstream installation for setup.exe (SQL Server setup)?
See possible answers