Advanced SQL: Relational division in jOOQ
Relational algebra has its treats. One of the most academic features is the relational division. It is hardly ever used, but comes in handy every now and then. And when you need it, you'll probably...
View ArticleThere is no Such Thing as Object-Relational Impedance Mismatch
Much of the ORM criticism of the last decade missed the point, being inaccurate. By the end of this article, we will conclude with the following: There is no significant difference between the...
View ArticleSemi Join and Anti Join Should Have Their Own Syntax in SQL
Relational algebra nicely describes the various operations that we know in SQL as well from a more abstract, formal perspective. One of the most common relational JOIN operations is the "equi-join" or...
View Article10 Easy Steps to a Complete Understanding of SQL
Too many programmers think SQL is a bit of a beast. It is one of the few declarative languages out there, and as such, behaves in an entirely different way from imperative, object-oriented, or even...
View ArticleSay NO to Venn Diagrams When Explaining JOINs
In recent times, there have been a couple of tremendously popular blog posts explaining JOINs using Venn Diagrams. After all, relational algebra and SQL are set oriented theories and languages, so it...
View Article5 Things You May Not Have Known About jOOQ
jOOQ has been around for a while now (since 2009!) and by now we can say we've seen quite a bit of things about the SQL and Java languages. Some of our design decisions are particular in the way jOOQ...
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