LIKE Constraints
In this article, I will cover a bit about the LIKE operator, including how it works, and a bit of history about why it is like it is. After establishing this, I will discuss a bit about how you can...
View ArticleBad Data and Dirty Databases
Many years ago, my wife and I wrote an article for Datamation, a major trade publication at the time, under the title, “Don’t Warehouse Dirty Data!” It’s been referenced quite a few times over the...
View ArticleUniqueness, Keys, and Identity
If you’ve ever had a traditional logic course, you’ll have run into “The Law of Identity” as the founding principle of all Western thought. It says that: “To be is to be something in particular; to be...
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Database Sharding: Strategies for Seamless Scaling and Performance Optimization
Companies of all sizes and across industries are struggling to cope with an explosion of data never before seen in the short history of computing. As applications reach new levels of sophistication...
View ArticleRounding Numbers
I would hope by now everybody has figured out when you see a price like $39.99 that it might as well be forty bucks. Dropping that penny from the price is done is to fool the consumer! Since we read...
View ArticleConsistency and Concurrency in NewSQL Database Systems
Companies today require database systems that are reliable and capable of efficiently handling large volumes of data and numerous transactions. Traditional relational databases, once the foundation of...
View ArticleTransactions
By now, pretty much everyone has heard the stories about the first computers. They were huge, cost a fortune, required incredible amounts of air conditioning, and perhaps more importantly, ran batch...
View ArticleData Control Language (aka Security)
Like ancient Gaul, SQL is divided into three sub- languages. The DDL (Data Declaration Language) declares the data. This is where we find the data types, constraints, references and other structures...
View ArticleVIEW Objects
A view is a virtual table, created when it’s invoked by the < view name>. The goal we had in the standards is to make it behave as much like a base table as possible. Creating a View The syntax...
View ArticleTemporary Tables
There is a feature of SQL I have not seen used much and probably with good reason. It’s the use of temporary tables. These are declared with the expected DDL. Since they were relatively easy to add to...
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