What is UUID and How to generate a UUID with Free API | OpenAPIHub Community

Alpha | SDE Interview Prep 🇮🇳 on Instagram: "Don’t call yourself Backend Engineer if you can’t prevent double payments 💳 The nightmare scenario: User books ₹50K flight. Network is slow. They panic-click “Pay” 3 times. Your server charges ₹1,50,000. This isn’t a bug. It’s a missing idempotency design. The Solution: Idempotency Keys When user clicks “Pay,” generate a unique key (UUID): X-Idempotency-Key: abc-123-xyz Your backend logic: 1. Check if key exists in Redis/DB 2. If YES → return cache

Generate Unique ID Numbers From Your Excel Data.

What is a UUID (Universally Unique Identifier)? | TechTarget

Definition of UUID

What is a UUID? - mParticle

SQL Table Join Performance for INT vs BIGINT vs GUID Data Types