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
773 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)
2,878 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)
5,822 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
1,591 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
1,590 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
10,770 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)
2,436 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)
8,565 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
5,304 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)
37,093 reads
Blogs
AI and Data Engineering on the Edge: The Good, the Bad, and the Overhyped
Running AI and data pipelines on the edge instead of the cloud has gone...
UNION vs UNIONALL: #SQLNewBlogger
By Steve Jones
While writing another post I realized my UNION query didn’t work as one might...
Deciphering Data Architectures Is Now Available in Multiple Languages
By James Serra
Since the release of my book Deciphering Data Architectures: Choosing Between a Modern Data...
Forums
Secure Cached Plans
Comments posted to this topic are about the item Secure Cached Plans
Complex Data Processing with dbt Python Models: The Fabric Modern Data Platform
Comments posted to this topic are about the item Complex Data Processing with dbt...
Over or Under Provisioned
Comments posted to this topic are about the item Over or Under Provisioned
Question of the Day
Secure Cached Plans
The DMV, sys.dm_exec_cached_plans, contains rows for each cached plan on an instance. In Azure SQL Database, not every used has rights to every database, as there does exist an instance behind each database. How is security handled for this DMV in Azure?
See possible answers