The simplest form of regression in Python is, well, simple linear regression. With simple linear regression, you're trying to ...

Database normalization is the cornerstone of database theory. Once a database is normalized, relationships between the data in multiple tables must be established.

An inherent awkwardness exists in every many-to-many relationship between entities. Ambiguity causes this persistent awkwardness, primarily because a many-to-many relationship is such a fuzzy thing.