Data Types In PostgreSQL: Character Data Types || PostgreSQL Full Playli...

Welcome to Part 45 of our PostgreSQL Full Course Playlist! 🚀

In this video, we dive deep into one of the most fundamental aspects of PostgreSQL — Character Data Types. You'll learn the key differences, use cases, and behaviors of:

• CHAR(n) – fixed-length, space-padded strings

• VARCHAR(n) – variable-length strings with a defined limit

• TEXT – flexible and unbounded character storage

• Internal types like bpchar, "char", and name

🎯 We'll cover real-world examples like storing employee codes, customer names, blog content, product SKUs, and user feedback. You'll also learn the implications of trailing spaces, padding, truncation, and storage behavior.

💡 This session is crucial for anyone designing tables, optimizing storage, or simply trying to choose the best string type in PostgreSQL.

Whether you're a student, backend developer, or DBA — by the end of this video, you'll know when to use TEXT over VARCHAR, why CHAR can be risky, and how PostgreSQL handles string storage under the hood.

📌 Topics Covered:

• Syntax & behavior of CHAR, VARCHAR, and TEXT

• Storage internals (TOAST, compression, padding)

• Behavior with trailing spaces

• Comparison semantics and limitations

• Best practices for choosing the right type

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📽️ Next Video: Data Types In PostgreSQL – Binary Data Types

Data Types In PostgreSQL: Money Data Types || PostgreSQL Full Playlist V...

In this video (PostgreSQL Playlist #44), we take a deep dive into the money data type in PostgreSQL, which is specially designed to store and manipulate currency values with fixed fractional precision.

💡 You’ll learn:

• What the money type is and how it works

• How to create tables and insert monetary values

• Type casting between money, numeric, and float

• Performing arithmetic with money values

• Real-world example: applying discounts on invoices

• Best practices to avoid rounding errors and locale mismatches

🛠️ This tutorial is perfect for developers, data engineers, and students looking to enhance their PostgreSQL database design and financial data handling skills.

📌 Don’t forget to check out the complete PostgreSQL series for more in-depth tutorials.

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Data Types In PostgreSQL: Numeric Data Types || PostgreSQL Full Playlist...

In this video (Part #43 of the PostgreSQL Full Playlist), we take a deep dive into Numeric Data Types in PostgreSQL—an essential concept for every backend or data engineer. 🚀

You’ll learn how to handle real-world data like prices, tax rates, measurements, sensor data, population counts, and financial transactions using:

• Integer Types: SMALLINT, INTEGER, BIGINT

• Fixed Precision: NUMERIC, DECIMAL

• Floating-Point: REAL, DOUBLE PRECISION

• Auto-Increment Types: SERIAL, BIGSERIAL

• Money Type: MONEY

• Special values: Infinity, -Infinity, NaN

We also explore precision, rounding behavior, and common pitfalls—along with RETURNING clauses for instant verification. No more boring examples—every use case in this video is practical and relatable. 🧮💰

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Common Table Expressions - CTEs in PostgreSQL || How to Write CTEs || Po...

In this video, we dive deep into Common Table Expressions (CTEs) in PostgreSQL — a powerful feature that helps you write cleaner, more modular, and efficient SQL queries.

Whether you're a beginner exploring PostgreSQL or an advanced user refining your skills, this tutorial covers everything you need to know about WITH queries, including:

• ✅ What is a CTE?

• ✅ Syntax and structure

• ✅ Benefits of using CTEs

• ✅ Simple CTEs for temporary data sets

• ✅ Recursive CTEs for generating sequences or traversing hierarchies

• ✅ Data-Modifying CTEs using INSERT, UPDATE, and DELETE

• ✅ Using CTEs with JOINs to simplify complex multi-table queries

• ✅ Materialization and performance tips

You'll see real-time PostgreSQL examples that demonstrate how CTEs can be applied to real-world scenarios like summarizing data, cleaning up subqueries, and chaining modifications.

📌 This video is part of our PostgreSQL Full Playlist, where we guide you step-by-step from basic concepts to advanced performance optimizations.

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VALUES Lists in PostgreSQL Queries || Queries in PostgreSQL || PostgreSQ...

In this video of our PostgreSQL Full Playlist (#41), we take a deep dive into the VALUES clause—a powerful feature that lets you define temporary constant row sets without creating a real table.

We cover a variety of real-world scenarios, including:

• Basic usage of the VALUES clause

• Assigning column aliases

• Using VALUES in INSERT statements (single and multiple rows)

• Joining VALUES with real tables in the FROM clause

• Performing bulk updates using VALUES and UPDATE together

• Working with type casting, such as filtering IP addresses

• Sorting and slicing result sets using ORDER BY, LIMIT, and OFFSET

Each example is practical, beginner-friendly, and designed to help you build solid SQL skills in PostgreSQL. Whether you're prepping for an interview or strengthening your database knowledge, this tutorial has something for everyone.

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👉 Next Video: WITH Queries (CTEs) in PostgreSQL