Booknotes: Grouping and my favourite HYTRADBOI talks

Booknotes 6. I’m writing a guide to building your own database server . Here’s what I’ve been doing: Progress This week I’ve hit the milestone of having a complete sample implementation! Grouping and aggregation Grouping and aggregation were the most complex parts to implement. This complexity comes from how grouping changes the structure of the data it acts on and how that interacts with type…