Mastering Relational Algebra and Normalization

The entire internet is basically useless without Relational Algebra. It is the hidden

math that powers every database query you have ever made. It starts with the abstract stuff,

using Sigma to select rows and Pi to project columns. That logic builds the foundation for

SQL, the language that actually retrieves your data using commands like SELECT

and GROUP BY. But the real skill is Normalization. It is the process of stripping away

redundancy so your storage is efficient. You move from First Normal Form all the way to BCNF

just to avoid data anomalies. Master the data structure and you master the code.