In this article, I will discuss the history and thinking behind several types of logic that are typically associated with writing relational database code. Because of how relational databases implement NULLs, it definitely can make some processes more complex than expected by may programmers (inexperienced and experienced alike!) Three Valued Logic Missing or UNKNOWN values … Read more
Ever wonder all the reasons that we use databases instead of file systems? While we don’t think of it too much anymore, the first reason that databases came into existence was to remove redundancies. The first source of redundancy back in the dark ages, when I was just beginning the program, was a product called … Read more
In software development the concept of feature toggles are used to selectively turn on and off features. They are, for example, used to restrict some newly introduced features to a select group to see how these features work. While this concept has been long used for user-facing application code, it is also a practice that … Read more
Dr. Codd first described the relational model in a paper in Communications of the ACM (CACM 13 No 6; June 1970). Some more work followed up after that by other people, giving us normal forms and other things we have taken for granted for 50+ years. I was looking at some postings on a SQL … Read more
