AI engineering glossary · SQL databases
What is functional dependency?
Functional dependency: A relationship where the value of one set of columns determines the value of another, written A -> B. Normal forms are defined in terms of these dependencies. Normalisation theory is built on these.
Functional dependency: an example
pincode -> city means each pincode always maps to one city.
Related terms
More SQL databases terms
Where you learn it
Functional dependency is part of the AI Engineering Program, which teaches it with notes, a hands-on lab and an exam. The first lesson is free.