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  Welcome to the MySQL for Beginners series! In this blog, we will dive into the world of MySQL transactions. MySQL transactions are fundamental concepts that allow you to manage and execute multiple database operations as a single unit. This ensures that your database remains consistent and reliable, even in the face of errors or unexpected issues. We’ll explore how to use  COMMIT  and  ROLLBACK  to manage transactions and learn about table locking for cooperative table access between sessions. Let's get started! What We Will Cover: Transaction—Learn  about MySQL transactions and how to use  COMMIT  and  ROLLBACK  to manage transactions in MySQL. Table Locking: Learn  how to use MySQL locking for cooperating table access between sessions. What is a MySQL Transaction? A transaction in MySQL is a sequence of one or more SQL statements that are executed as a single unit of work. This means that either all the statements within the tra...

  A Simple Guide to a Powerful SQL Feature Welcome back to the latest part in our series on MySQL for Beginners! Today, we’ll explore Common Table Expressions (CTEs), an excellent SQL tool that may greatly streamline complicated queries. CTEs are a useful tool to have in your toolbox if you’ve ever had to write complex SQL queries. Common Table Expressions: What Are They? Consider yourself constructing a Lego palace. Starting with basic bricks, you can build walls, towers, and eventually a magnificent castle by combining them. CTEs work similarly. They allow you to break down complex queries into smaller, more manageable parts, just like building blocks. Why Use CTEs? Improved Readability:  By breaking down complex queries, CTEs make your SQL code easier to understand and maintain. Reusability:  You can reference a CTE multiple times within a single query, reducing redundancy and improving efficiency. Hierarchical Queries:  CTEs are particularly useful for handling h...

  Welcome to the  MySQL for Beginners  series! In this post, we’ll focus on an essential concept called  subqueries . A subquery is like having one question inside another question, helping you to get more detailed information from your database. MySQL is a powerful and flexible database management system, and learning it can unlock many opportunities. This post is part of the “MySQL for Beginners” series, and today, we will focus on  subqueries  — an essential concept for efficiently managing databases. By the end of this blog, you’ll understand how to use subqueries, derived tables, and the  EXISTS  keyword in MySQL. We’ll even include examples with real data! What Will This Blog Cover? Subqueries:  What they are and how to use them with examples. Derived Tables:  How temporary tables make your queries more efficient. EXISTS:  A way to check if certain data is present. 1) Subquery A subquery is a query inside another query. It’s u...