When do Distribution Statistics Get Updated?
Statistics objects are important to us for allowing SQL to make good estimates of the row-counts involved in different parts...
2017-07-05
758 reads
Matthew McGiffen DBA
Row-count Estimates when there are no Statistics
I was discussing Cardinality Estimation with a colleague recently and the question came up, what cardinality does SQL Server use...
2019-04-26 (first published: 2017-06-28)
2,801 reads
Statistics and Cardinality Estimation
Cardinality
This is a term originally from Mathematics, generally defined as “The number of objects in a given set or grouping”....
2019-04-26 (first published: 2017-06-20)
5,729 reads
What’s an “Index” and how do they work?
What is an Index?
We often hear indexes explained using the analogy of an index in the back of a book....
2017-06-12
1,568 reads
SQL Puzzle 1: Magic Squares
This is the first in what I hope will be a semi-regular series of recreational puzzles where SQL can be...
2017-06-07
1,504 reads
Working with Data in Always Encrypted
In this post we’re going to create some encrypted columns in a table in a test database and look at...
2017-06-06
9,215 reads
Statistics Parser
In the last post we looked at using the STATISTICS IO and STATISTICS TIME commands to measure query performance.
If you’ve...
2019-04-26 (first published: 2017-05-31)
1,968 reads
Understanding Keys and Certificates with Always Encrypted
Always Encrypted on SQL 2016 is pretty easy to set up. There’s even a single wizard to guide you through...
2019-04-26 (first published: 2017-05-30)
7,837 reads
Tuning Parallelism on SQL Server
Parallelism and MAXDOP
There’s no doubt that parallelism in SQL is a great thing. It enables large queries to share the...
2017-05-26
5,219 reads
Measuring SQL Query Performance
When running workshops on the subject of SQL Query Performance the first question I always ask is how do we measure...
2019-04-26 (first published: 2017-05-24)
32,689 reads
Blogs
My 2024 in Data: Music
By Steve Jones
This is my last week of the year working (I guess I come back...
A New Word: Suente
By Steve Jones
suente– n. the state of being so familiar with someone that you can be...
Side Projects
Anyone (everyone?) who has ever tried to learn a programming language knows that to...
Forums
Timeout Error while executing a TSQL statement in Sql server Express Edition
I am getting the below error when I execute a SQL command in SQL...
Timeout Error while executing a TSQL statement in Sql server Express Edition
I am getting the below error when I execute a SQL command in SQL...
Sql script replace and rearrange numbers
Hi everyone. I have this table and this information. (left side of the image)...