Chapter 37 of 1962 min read
Lesson 4.3 β Foreign Keys: Linking Tables for Real
𧬠Biological Scenario: Now build the table, linked back to via a foreign key (Part 1, Lesson 1.4) β the mechanism that actually enforces the one to many relationship in the database itself, not just conceptually. π»β¦
Sign in to read this
βLesson 4.3 β Foreign Keys: Linking Tables for Realβ is for subscribers. Start with a free account β it takes a name and an email β then subscribe for $1 a month to open it.
- Python and R courses free in full
- First two chapters of every other course