Concurrency Control in SQL Server
Learn a bit about concurrency problems in SQL Server, the issues they create, and the different isolation levels that help you solve them.
Defending Against Ransomware
Many more companies that you have heard about have been attacked by ransomware. Steve suggests you get prepared before this happens to you.
Translating a SQL Server Schema into a Cassandra Table: Part III Many-to-Many, Attribute Closure and Solution Space
In the third and final article of the series, Shel Burkow demonstrates several designs that cover many-to-many relationships, attribute closure, and solution space with Cassandra tables.
Using SQL Clone and SQL Change Automation to switch database branches
Learn how to use SQL Clone together with Git hooks and SQL Change Automation to branch your database in Git as easily as your code. By enabling multiple copies of the same database to exist on a single instance, the integration of these tools allows seamless database branch switching.
Postgresql JDBC Tutorial on Linux
PosgtreSQL is a free and general purpose open source object-relational database system that uses and extends the SQL language. Though originally designed to run on UNIX platforms, Postgres is able to run on various platforms, such as macOS, Solaris, Windows, Unix, and Linux. PostgreSQL databases provide enterprise-class database solutions and are used by a wide […]
Making a Difference in Uncertain Times
For some people, it’s not enough to take care of their own households and those of their families and neighbors. They’ve decided it’s important to make a difference in their communities and beyond.
SQL Change Automation enables a new flexible approach to DevOps
In the latest version of SQL Change Automation, we enable you to be more flexible in your approach to Database DevOps and combine elements of both state- and migrations- based approaches. Learn more about the new workflow.
Blogs
Automatic Index Compaction
By ReviewMyDB
Index maintenance has always meant nightly jobs and a window you have to defend....
The Goldilocks problem – Materialized Views
I’m sure you’ve all heard the tale of Goldilocks and the Three Bears, but...
Monday Monitor Tips: Virtual Machine Usage and Cost
By Steve Jones
One of the things I’ve been requesting for a number of years is cost...
Forums
SQL Art, Part 4: Happy 4th of July — A British DBA's Guide to Celebrating a War We Don't Talk About
Comments posted to this topic are about the item SQL Art, Part 4: Happy...
How We Handled a Vendor Retry That Loaded Twice in Snowflake
Comments posted to this topic are about the item How We Handled a Vendor...
Cognitive Coverage
Comments posted to this topic are about the item Cognitive Coverage
Question of the Day
Getting the Average
I have this data in the dbo.Commission table in a SQL Server 2022 database.
salesperson commission Brian 12 Brian 16 Andy 7 Andy 14 Andy 21 Steve 20 Steve NULLAll the data is a varchar, and I decide to run this query to get the totals for each salesperson.
SELECT SalesPerson
, AVG(TRY_PARSE(Commission AS int)) AS TotalCommission
FROM commission
GROUP BY SalesPerson
GO
What average commission is calculated for Steve? See possible answers