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Understand the difference between REAL and DOUBLE PRECISION in PostgreSQL. Learn how floating-point types work, when to use them, and their pitfalls.

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Description
🌡️ Is PostgreSQL really storing your numbers accurately? You might be surprised!

In this essential video, we explore the truth behind floating-point types in PostgreSQL — namely, REAL and DOUBLE PRECISION. These types are fast and space-efficient but come with trade-offs in accuracy and precision.

📊 Here’s what we break down:

What are REAL (4 bytes) and DOUBLE PRECISION (8 bytes)?

How PostgreSQL stores these values using IEEE 754 floating-point standard

Why you may see weird outputs like 0.1 + 0.2 = 0.30000000000000004

Performance vs precision: when to choose REAL, when to prefer DOUBLE

Real-life examples in scientific data, weather systems, and approximations

⚠️ Why you should avoid FLOAT types for money and sensitive calculations

Comparison with NUMERIC and DECIMAL, and how to spot rounding issues

We also show you how to use INSERT ... RETURNING * to observe float behavior firsthand.

🔔 Part of our PostgreSQL Full Playlist, this video is a must-watch for backend devs, data engineers, and curious learners!

#PostgreSQL #FloatingPoint #REALvsDOUBLE #PostgreSQLTips #LearnSQL #NumericTypes #CSstudents #IEEE754 #PostgreSQLPrecision #DataEngineering #SQLTutorial

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