Re:Advanced SQL and database books and resources
by SQLite on Monday May 11, 2020 @11:51AM
(#23143418)
On-line docs describing the design and
internal operation of SQLite include:
https://sqlite.org/arch.html
https://sqlite.org/optoverview.html
https://sqlite.org/opcode.html
https://sqlite.org/queryplanner.html
https://sqlite.org/atomiccommit.html
Inspired by this post, I started yet another: https://sqlite.org/draft/howitworks.html
Otherwise there is surprisingly a lack of information about architecting databases online and you have to go to the source code of SQLite and PostgreSQL. I suspect this is because databases are some of the most complex systems in computer science and involve many trade secrets.