PostgreSQL Money Data Type – Simple Intro with Examples

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Learn how PostgreSQL handles the MONEY data type with real-world examples, type casting, currency math, and best practices for financial data.

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Description
Welcome to this PostgreSQL tutorial where we dive deep into the MONEY data type — a crucial yet often misunderstood type when dealing with financial data like pricing, invoices, and currency calculations.

💸 In this video, you'll learn:

What the MONEY type is and when to use it.

How to define MONEY columns in PostgreSQL tables.

Why casting from FLOAT to MONEY can lead to rounding issues.

How to safely convert MONEY to NUMERIC for precision.

Real-world operations: addition, subtraction, division, and invoice-based examples.

We break down each concept with realistic business use cases, such as applying discounts to customer invoices and dividing monetary values with rounding.

💼 Whether you're building an e-commerce platform, accounting system, or a finance app, understanding how PostgreSQL handles money will save you time — and potential bugs.

🔎 Chapters:

Basic MONEY usage

Creating tables with MONEY columns

Casting rules & warnings

Division: truncating vs rounding

Practical invoice example with discount logic

🧠 Pro Tip: Always be careful when mixing FLOAT and MONEY types — PostgreSQL’s implicit casting might cause precision loss!

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