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Course Content
MySQL Tutorial
Welcome to the MySQL tutorial — crafted for everyone, whether you're taking your first steps into the world of databases or you're a developer looking to refine your skills with advanced MySQL techniques. From understanding the fundamentals of relational data to mastering complex SQL queries, transactions, stored procedures, and performance tuning — this guide has you covered.
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MySQL Environmental Setup
Setting up MySQL is the first step toward working with relational databases. Below is a complete guide to help you install and run MySQL on your system, whether you are using Windows, Linux, or macOS. The second step is to start and stop MySQL service on your system. This ensures the MySQL server is running and ready to accept connections and execute queries.
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MySQL Basics
SQL (Structured Query Language) is the standard language used to communicate with relational databases like MySQL. It allows you to create, modify, manage, and retrieve data from tables using simple and powerful commands.
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MySQL Crud Operations
CRUD stands for Create, Read, Update, and Delete — the basic operations you perform on data in any MySQL database. These operations allow you to insert new records, retrieve data, update existing values, and remove records when needed.
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MySQL Joins
In MySQL, JOINs are used to combine rows from two or more tables based on related columns. They are essential when your data is spread across multiple tables and you need to bring it together in one query result.
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Stored Procedures & Functions in MySQL
This section explains the concepts of stored procedures and user-defined functions (UDFs) in MySQL, covering their creation, usage, parameters, differences, control flow, determinism, and advanced behavior — nothing is skipped.
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MySQL Triggers
This section covers everything about Triggers and Events in MySQL — including what they are, how they work, when to use them, all the types available, and how to manage them. Each point comes with simple explanations and examples.
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User Management and Security in MySQL
Managing users and securing your MySQL server is essential to control access, protect data, and prevent unauthorized operations. MySQL provides powerful tools to handle users, assign roles, and enforce fine-grained access control using privileges.
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MySQL Performance Tuning
MySQL Performance Tuning is the process of optimizing how your database server, queries, indexes, and schema work together to provide the fastest and most resource-efficient responses. When a database starts to slow down under load, tuning ensures better speed, reduced CPU/memory usage, and quicker access to data — especially for high-traffic applications or large datasets. It involves query optimization, proper indexing, schema design, and server-level configurations that reduce delays and improve efficiency across all operations.
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Query Optimization Techniques in MySQL
Query optimization is the process of writing SQL queries in a way that minimizes execution time and resource usage (like CPU, memory, and disk I/O). MySQL’s optimizer decides the best way to execute your SQL query, but your query structure can drastically impact performance. By following smart query practices, using indexes, avoiding expensive operations, and understanding how MySQL executes your statements, you can dramatically boost your database performance.
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Replication in MySQL
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MySQL

Importing .sql Files from MySQL Workbench

MySQL Workbench provides a graphical interface to import .sql files easily.
Follow the steps below to restore your database using the Data Import Wizard.

Step 1: Open MySQL Workbench

On the Workbench home screen, click on the appropriate connection to your MySQL server.
If you haven’t created a connection yet:

  • Click + to add a new connection
  • Enter hostname, port, username, and password
  • Click Test Connection to verify
  • Save and open the connection

Step 2: Navigate to Data Import

Once connected:

  • Go to the top menu bar
  • Click Server > Data Import

This opens the Data Import Wizard, which guides you through the import process.

Step 3: Choose Import Method

In the Data Import screen:

  • Select Import from Self-Contained File
  • Browse and choose your .sql file (e.g., school_backup.sql)

The file should contain SQL statements generated by mysqldump or another export tool.

Step 4: Select Target Database

Choose the database where you want to import the data.

Step 5: Start the Import

Click Start Import at the bottom right of the wizard.
MySQL Workbench will execute the SQL statements from the file and restore your database.

Scheduled Backups Using Cron (Linux/macOS)

You can automate regular backups of your MySQL databases using the cron scheduler. This ensures that backups are created at fixed intervals without requiring manual execution.

Example: Daily Backup at 2 AM

0 2 * * * mysqldump -u root -p[yourpassword] school_db > /backups/school_db_$(date +%F).sql

The above cron job runs every day at 2:00 AM, creating a backup file with the current date appended to its name (e.g., school_db_2025-09-07.sql).

Security Note

Avoid placing your password directly in the cron job. Instead, use a ~/.my.cnf file to store your MySQL credentials securely.