Constraints
Everything on SkillVeris tagged Constraints — collected across the glossary, study notes, blog, and cheat sheets.
7 resources across 2 libraries
Study Notes(5)
Constraints and Keys
Learn how PRIMARY KEY, FOREIGN KEY, UNIQUE, CHECK, DEFAULT, and NOT NULL constraints enforce data integrity directly at the database layer.
Templates in D
Learn D's compile-time generic programming system: function and struct/class templates, constraints, and variadic templates.
Constraints in Depth
A thorough look at PostgreSQL's constraint types -- PRIMARY KEY, FOREIGN KEY, CHECK, UNIQUE, NOT NULL, and EXCLUDE -- and how they enforce data integrity at th…
Generic Constraints in TypeScript
Learn how to restrict generic type parameters with `extends` so generic code can safely rely on specific properties or shapes.
Constraints and Data Integrity
Explore how PRIMARY KEY, FOREIGN KEY, UNIQUE, NOT NULL, CHECK, and DEFAULT constraints enforce valid data.
Interview Questions(2)
What is Referential Integrity?
Referential integrity is a database rule ensuring that a foreign key value in one table always matches an existing primary key value in the referenced table, p…
What Are Generics in TypeScript and Why Use Them?
Generics let you write functions, interfaces, and classes that work with a type parameter decided at the call site, so you get full type safety without duplica…