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Introduction to MySQL
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Introduction to MySQL
Features of MySQL
Applications of MySQL
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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Installing and Configuring MySQL
Starting and Stopping MySQL Service
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 Commands
MySQL Clauses
MySQL Functions
MySQL Operators
MySQL Constraints
MySQL Data Types
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Introduction to MySQL Data types
Types of Data Types
MySQL Operations
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Introduction to MySQL table operations
Types of Table Operations in MySQL
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 Table Operations and Examples
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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Types of JOIN Operations
MySQL Keys
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Types of Keys in MySQL
MySQL Index
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Types of Index in MySQL
MySQL Views
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Introduction to MySQL Views
Basic Operations on Views
Updatable Views
Non-Updatable Views
MySQL Transactions
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Introduction to MySQL Transactions
Transaction Control Commands in MySQL
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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What are Stored Procedures and Functions?
Working with Stored Procedures and Functions in MySQL
Parameters in Stored Procedures
Control Flow Statements in Procedures
Difference between Stored Procedures and Functions
Deterministic and Non-Deterministic Functions
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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Introduction to Triggers in MySQL
Working with Triggers in MySQL
Advantages of Triggers
Real-World Use Cases of MySQL Triggers
MySQL Events
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Introduction to Events in MySQL
Working on Events in MySQL
Advantages of Events
Real-World Use Cases of MySQL Events
MySQL Locks
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Introduction to MySQL LOCK?
Importance for MySQL Locks
Types of MySQL Locks
Locking Mechanisms and Transaction Control in MySQL
MySQL Deadlocks
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Introduction to MySQL Deadlocks
Detection and Prevention of MySQL Deadlocks
Locking error in MySQL
Best Practices for Using MySQL Locks
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 User Management
Security Management
Backup and Restore in MySQL
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Introduction to Backups and Restore
MySQL Backup and Restore Using mysqldump
Import .sql Files
MySQL Backup Errors
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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1. Use Indexes Effectively
2. Avoid Select* in Queries
3. Use EXPLAIN to Analyze Queries
4. Optimize Joins and Subqueries
5. Use LIMIT to Control Results
6. Tune MySQL Server Configuration
7. Normalize and Optimize Schema Design
Additional Key Points
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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Different applications and uses
Partitioning in MySQL
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Introduction
Different types of Partitioning
Replication in MySQL
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Introduction
Practice Zone
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Multiple Choice Questions (MCQs)
Mini Projects
SQL Problem Sets
Interview Questions (Basic to Advanced)
MySQL

Be ready for job interviews with practical and conceptual questions.

🔹 Basic Interview Questions

  1. What is the difference between WHERE and HAVING?
  2. Define the difference between PRIMARY KEY and UNIQUE KEY.
  3. What is a Foreign Key? Explain with an example.
  4. What is the purpose of the NOT NULL constraint?
  5. What are the different types of SQL JOINs in MySQL?
  6. How is TRUNCATE different from DELETE?
  7. What does SELECT DISTINCT do?
  8. What is the default port used by MySQL?
  9. Explain the role of the DEFAULT keyword in column definition.
  10. What is a view in MySQL and why is it used?


🔹 Intermediate Interview Questions

  1. How do indexes improve the performance of queries?
  2. What is the use of AUTO_INCREMENT in MySQL?
  3. What is normalization? Name the different normal forms.
  4. Explain the difference between CHAR and VARCHAR.
  5. What is a stored procedure? How is it different from a function?
  6. Explain the purpose of GROUP BY with an example.
  7. What is a composite key? Give an example.
  8. What is the difference between INNER JOIN and LEFT JOIN?
  9. What are transactions in MySQL?
  10. How do you back up and restore a MySQL database?

 

🔹 Advanced Interview Questions

  1. Explain how replication works in MySQL.
  2. What are locks in MySQL and how do they affect transactions?
  3. What is the difference between table-level locking and row-level locking?
  4. What is a trigger? Provide a use case where it’s beneficial.
  5. What are the ACID properties of a transaction?
  6. What is query optimization and why is it important?
  7. How do partitioned tables work in MySQL?
  8. What is the difference between logical backup and physical backup?
  9. What is a full-text index and when would you use one?
  10. What are deterministic and non-deterministic functions in MySQL?

 

🔹 Expert/Real-World Scenario Questions

  1. How would you handle deadlocks in a multi-user environment?
  2. What steps would you take to diagnose a slow query?
  3. Explain the master-slave replication setup. What are its limitations?
  4. How can you prevent SQL injection in MySQL?
  5. What would you do if a user accidentally dropped a production table?
  6. How can you implement data archiving in MySQL?
  7. What is the use of EXPLAIN in query optimization?
  8. How do you secure a MySQL server in a production environment?
  9. What are the effects of running MySQL in autocommit mode?

When would you use MERGE tables or partitioning over normal tables?

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