UUID in Databases: Best Practices for PostgreSQL, MySQL, MongoDB
Store UUIDs efficiently in relational and NoSQL databases. Covers index performance, storage size, and native UUID types in major databases.
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Tags: developer-tools, uuid, databases
UUID in Databases: Best Practices for PostgreSQL, MySQL, MongoDB Using UUIDs as primary keys is common, but the implementation details matter enormously for performance. A UUID stored as a in MySQL behaves very differently from a UUID stored as a native type in PostgreSQL. This guide covers storage options, index performance, generation strategies, and the practical tradeoffs for the three most common databases. PostgreSQL Native UUID Type PostgreSQL has a native type that stores UUIDs as 16 bytes — the most compact binary form. Never use in PostgreSQL when is available. generates UUID v4 using PostgreSQL's internal CSPRNG. It has been available since PostgreSQL 13 without any extension. For PostgreSQL 8.4–12, install : Index Performance with v4 UUIDs Random UUID v4 values cause B-tree…
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