postgresql

D. Richard Hipp's PGCon 2014 keynote on SQLite's relationship to PostgreSQL. He explains that SQLite was originally written from PostgreSQL 6.5 documentation and that the two engines serve different classes of problems.

Dan Robinson, then CTO of Heap, explains how Heap runs its product analytics backend on PostgreSQL and CitusDB. It covers conversion funnels, retention and cohort queries across tens of billions of events and 50 TB of data, plus Postgres and Kafka together and the indexing strategy.

Lukas Eder's Devoxx talk on how modern cost-based SQL optimizers rewrite and plan queries in ways developers would not expect. It argues that declarative SQL, used well, can run complex queries very fast.