Glossary term
What is UUID (Universally Unique Identifier)?
UUID stands for Universally Unique Identifier.
A 128-bit ID that's unique without coordination. Example: 7f3c9a2e-4b1d-4e8a-9f0c-2d6b1e5a8c33.
Learn it properly · System DesignLesson 5: SQL Basics Every System Designer NeedsBefore sharding, replicas or NoSQL, learn to use one relational database well. Tables and keys, the queries you will write every day, indexes and EXPLAIN, the N+1 trap, transactions, and the connection limit that takes databases down.