SQL
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Software Development
SQL GROUP BY and Functional Dependencies: A Very Useful Feature
Relational databases define the term “Functional Dependency” as such (from Wikipedia): In relational database theory, a functional dependency is a…
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Software Development
How to Find the Longest Consecutive Series of Events in SQL
A very interesting problem that can be solved very easily with SQL is to find consecutive series of events in…
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Software Development
NoSQL vs. SQL: Choosing a Data Management Solution
Table Of Contents 1. Introduction 2. Distributed systems: the CAP theorem 3. Relational data stores 3.1. MySQL / MariaDB 3.2.…
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Software Development
How to Find the Closest Subset Sum with SQL
I’ve stumbled upon this very interesting question on Stack Overflow, recently. Its title is: [How to] compare a number with…
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Software Development
Leveraging new features in Drill 1.2 – ANSI SQL Analytic/Window functions
Today we are very excited to announce the latest version of Apache Drill, 1.2,) as part of the MapR distribution.…
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Software Development
jOOQ Tuesdays: Markus Winand is on a Modern SQL Mission
Welcome to the jOOQ Tuesdays series. In this series, we’ll publish an article on the third Tuesday every other month…
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Software Development
The 10 Most Popular DB Engines (SQL and NoSQL) in 2015
About two years ago, we’ve published this post about the 10 most popular DB engines, where we analyzed the data…
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Software Development
You Probably don’t Use SQL INTERSECT or EXCEPT Often Enough
When people talk about SQL JOIN, they often use Venn Diagrams to illustrate inclusion and exclusion of the two joined…
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Software Development
Don’t Format Dates in SQL. Use the DATE Literal!
I’m seeing people do this all the time. They want to hammer a date or timestamp constant into their SQL…
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