Data Types in PostgreSQL: UUID Data Types || PostgreSQL Full Playlist #53

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Learn everything about UUID data types in PostgreSQL with examples, best practices, and performance tips. Part of the full PostgreSQL series.

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Description
Welcome to Part 53 of our full PostgreSQL tutorial playlist! 🎥
In this video, we explore the UUID (Universally Unique Identifier) data type in PostgreSQL — a crucial tool for distributed systems and secure, globally unique identifiers.

UUIDs are 128-bit identifiers standardized by RFC 4122, and PostgreSQL provides native support for them using the uuid data type. We'll guide you through:

What UUIDs are and how they're formatted
Differences between UUID and SERIAL types
How to use the uuid-ossp extension to generate UUIDs
Creating tables with UUID primary keys
Writing SQL statements using UUIDs (including inserts, selects, and references)
Use cases and performance considerations
Bonus: Real-life examples for UUID-based design

💡 Whether you're building microservices, secure APIs, or scalable systems — UUIDs can give your application a powerful edge in uniqueness and security.

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📌 Chapters Covered:
00:00 - Introduction
00:21 - Standard UUID Format
00:32 - Alternative Accepted Formats
00:56 - Enable/Create uuid-ossp Extension
01:20 - Creating a Table with UUID as Primary Key
01:48 - Insert Data into the Table (UUID auto-generated)
02:17 - Insert Data with Custom UUID (manually assigned)
02:47 - UUID Column with Unique Constraints in Another Table
03:53 - Generate UUID in query without storing - uuid_generate_v4
04:33 - UUID as default value in composite tables
05:12 - UUID vs SERIAL
05:36 - Conclusion