2023-11-27
5,620 reads
Database Design and Implementation
Do You Still Use CHAR?
When designing a database, choosing good datatypes is important, but not necessarily all the time. Today Steve wonders if you still use fixed sting data types.
2022-02-11
216 reads
Mathematicians and SQL
Georg Ferdinand Ludwig Philipp Cantor is considered the creator of set theory, and his theories are the basis for the naïve set theory you learned in school. But there are lots of other mathematicians you should know, such as Hilbert, Frege, Russell, Zermelo and Dedekind. They made a lot of contributions, too. Hilbert Hilbert is […]
2021-01-19
5,606 reads
Data Element Names and Scoping Rules in SQL
How you name data elements in databases and applications programs has often been a matter of personal taste. Decades ago, when I worked for state government, there is a COBOL programmer who would pick a theme for his programs. The paragraphs and variables would be named based on the current theme. One of his programs […]
2021-01-11
2,124 reads
Understanding Data Modeling Part 4: Fact Modeling
In Part 1 we presented some foundation knowledge with which to debunk misconceptions lurking in the "data models" mess in the industry that Friesendal has tried to catalog. In...
2019-05-04
The Blast Radius of a database
Phil Factor feels that the database gets the short shrift in any outage - it's time to stop saying "the database has gone down" and time to start thinking about the resilience of the entire system.
2019-05-04
482 reads
Downgrading A SQL Server Database To An Older Version
"How do I restore a SQL Server backup to a previous version of SQL Server?" is a commonly-asked question. The answer, of course, is you don't - but if you must, there may be some solutions.
2019-05-03
Should I pluralize table names, is it Person, Persons, People or People?
There is a lot of confusion when it comes to designing tables in SQL Server around whether to pluralize names or not. How do you choose whether to pluralize or not?
2019-05-03
Designing Highly Scalable Database Architectures
While architecting cloud native applications, you need to ensure that your system is highly available, performant, scalable, fault tolerant, and has the capability to recover from a disaster scenario. In this article, Samir Behara discusses the options available when designing the database architecture to achieve scalability.
2019-05-02
Understanding Data Modeling Part 2: "E/RM" and "RDM"
In Part 1 we presented some foundation knowledge with which to debunk misconceptions lurking in the industry's modeling mess that Friesendal has tried to map, and to show how...
2019-04-22
Blogs
Simplify Kubernetes Security With Kyverno and OPA Gatekeeper
Here’s how these tools can make Kubernetes security easier and help you avoid common...
A New Word: Lackout
By Steve Jones
lackout – n. the sudden awareness that you’re finally over someone, noticing that the...
Delta Lake over Spark Connect
By Ed Elliott
All Spark Connect Posts I have just finished an update for the spark connect dotnet...
Forums
Merge techniques
In Azure SQL DB, i want to merge records from the staging table to...
SSRS error: The Value for the image 'Image1' has a constant value...
Full error message: SSRS error: The Value for the image 'Image1' has a constant...
XML_COMPRESSION for existing tables
We are in the process of upgrading to SQL Server 2022 and would like...
Question of the Day
Adding Defaults
I have a table, called dbo.logger, in SQL Server 2022. I decide to add two new columns to this table with this code.
ALTER TABLE dbo.logger ADD CreateDate DATETIME CONSTRAINT dfGetDate DEFAULT GETDATE() GO ALTER TABLE dbo.logger ADD ModifyDate DATETIME DEFAULT dfGetDate GOWhat happens when I run these two batches? See possible answers