Manually updating Statistics
Having up to date statistics is vital for getting the best performance out of your queries. Even though SQL Server automatically updates statistics in the background for you, you...
2021-02-16
226 reads
Matthew McGiffen
- Twitter: @MattMcGiffen
- Website: https://matthewmcgiffen.com/
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
183 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)
295 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)
501 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)
470 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)
695 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)
536 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)
930 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)
7,121 reads
Instantaneous Transaction Rollback with SQL 2019
If you’ve read about the Accelerated Database Recovery feature in SQL Server 2019 you could be forgiven for thinking it’s just about speeding up database recovery time in case...
2019-10-09 (first published: 2019-09-25)
950 reads
Blogs
T-SQL Tuesday #193 - Notes to Self
By alevyinroc
T-SQL Tuesday is a monthly blog party hosted by a different community member each...
T-SQL Tuesday #193 – Notes to my past self and from my future self
By DataOnWheels
It has been a while since my last T-SQL Tuesday blog. When I saw...
T-SQL Tuesday #193 – Notes to past and future me
The last T-SQL Tuesday of the year is hosted by my good friend Mike...
Forums
What is the PRODUCT
Comments posted to this topic are about the item What is the PRODUCT
Metadata Driven Pipelines (Incremental Load): The Fabric Modern Data Platform
Comments posted to this topic are about the item Metadata Driven Pipelines (Incremental Load):...
Metadata Driven Pipelines (Incremental Load): The Fabric Modern Data Platform
Comments posted to this topic are about the item Metadata Driven Pipelines (Incremental Load):...
Question of the Day
What is the PRODUCT
In SQL Server 2025, what does this return?
CREATE TABLE Numbers ( n INT) GO INSERT dbo.Numbers ( n ) VALUES (1), (2), (3) GO SELECT PRODUCT(n) FROM dbo.NumbersSee possible answers