DataSimp

All the 7 types of SQL Joins, can convert to 5 types in essence: inner join, side join, empty side join, full outer join, and empty full outer join.

Encyclopedia of Distances
Distances, dissimilarities, and divergences, what else! 😀How it started... How it is going! If you want to study information technologies, especially data science and artificial intelligence, the mathematical methods especially informational geometry and one of its branches — the measurement of distances, are very important and foundational. This book Encyclopedia of Distances and the subject collection will bring you into the world of such fields of mathematics. website: https://franknielsen.github.io/Divergence/index.html