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

Welcome to Video #46 in our PostgreSQL Full Playlist! 🎥

In this video, we dive deep into one of the most essential data types in PostgreSQL — the Boolean Data Type. Learn how PostgreSQL handles binary logic with TRUE, FALSE, and NULL (unknown) values. We’ll walk through how to declare Boolean fields, accepted input formats (like yes, 1, off, etc.), and demonstrate real-world use cases like tracking product availability, student enrollment, and user activity statuses.

You'll also learn:

• The internal storage and behavior of booleans in PostgreSQL.

• SQL-standard vs. alternate representations ('1', 'no', 'yes', etc.).

• How NULL behaves differently and when to cast it explicitly.

• Writing smart queries using WHERE clauses for TRUE, FALSE, and NULL values.

Whether you're preparing for interviews, building applications, or just exploring PostgreSQL, this video will give you the practical knowledge you need.

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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