Complex integrity constraints are more challenging to enforce in Cassandra than they are in a relational database. In this article, Shel Burkow walks through four modelling examples in Cassandra involving constraints.
There is a lot of information held in SQL Server metadata about your SQL Server procedures, triggers, views and functions. Some of it is valuable, other nuggets are useful and a few are rather dull but worthy. It really all needs to be tied together to tell the full story, especially if you are not able to, or do not want to, query the metadata directly.
This article demonstrates how the geometric functions in SQL can be use to solve the Islands and Gaps problem.
Working from home can be hard and Steve has a few ideas that might help you transition during these challenging times.
I can’t remember a time when I was not involved in side-projects, usually as a volunteer but also writing books or creating courses. New projects are like bright, shiny objects, and it’s easy to get involved in too many of them.
Caching data is one way to improve application performance. In this article, Chandra Kudumla explains a service for caching data found in Azure called Azure Cache for Redis.
A new security flaw in Intel SGX is found by researchers. This may or may not be a problem, but you should be aware.
In this article, 1st of 2-part series, we will look at 2 approaches to import JSON in SSIS using 2 methods: the new functionality of SQL Server 2016 and the Json.NET library.
Microsoft is retiring some certifications and offering others. Steve has a few thoughts on this.
I’m teaching my Mastering Index Tuning pre-con at SQLBits and SQL Saturday Iceland, and part of the prerequisites is that you’re already familiar with my How to Think Like the Engine class and my Fundamentals of Index Tuning class. To make that easier, I’m running the Fundamentals of Index Tuning class this week on the blog.
By Steve Jones
I type fairly well. Well, I type fast, but I do wear out a...
By ReviewMyDB
Index maintenance has always meant nightly jobs and a window you have to defend....
I’m sure you’ve all heard the tale of Goldilocks and the Three Bears, but...
Comments posted to this topic are about the item SQL Art, Part 4: Happy...
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WA:0817866887 Wisma BCA Pd. Indah, Jl. Metro Pondok Indah No.10, RT.3/RW.17, Pd. Pinang, Kec....
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