New posts in Unique Constraint

When should the IGNORE_DUP_KEY option be used on an index?

Index Uniqueness Overhead

How to generate globally unique ids for different tables of the same database?

Choosing primary keys: Scientific names of species or system-assigned numeric identifiers?

Lookup performance of Numeric vs String

Deferrable unique index in postgres

How to enforce uniqueness of compound primary key made up of two foreign keys to the same table?

Why do composite foreign keys need a separate unique constraint?

PostgreSQL UPSERT issue with NULL values

DynamoDB - Multiple range keys