Free Udemy Course 2025: Comprehensive SQL & Database Management - Free Udemy Course [100% Off]

This course is designed to help you master SQL and database management through a series of practice questions, including multiple-choice, multiple-selection, and true/false questions. With a strong focus on both theory and practical SQL queries, this course will give you the tools you need to excel in SQL interviews, database management tasks, and real-world applications.SQL (Structured Query Language) is the backbone of most modern databases, and mastering it is essential for data manipulation, querying, and managing databases efficiently. This course is packed with questions that cover everything from the fundamentals of database creation to more advanced topics like joins, subqueries, and transaction control.The course is divided into six comprehensive sections, each focusing on different core aspects of SQL and database management.Section 1: Database Creation and ManagementIn this section, you'll learn how to create and manage databases effectively. You’ll cover the fundamental SQL commands to handle databases and tables, ensuring you have a solid foundation in the basics of database management.Topics:CREATE DATABASE and DROP DATABASE: Learn how to create and remove databases using simple SQL commands.SHOW DATABASES and SHOW TABLES: Get comfortable with commands to list all databases and tables in your system.CREATE DATABASE IF NOT EXISTS and DROP DATABASE IF EXISTS: Understand how to handle existing databases, avoid errors, and ensure smooth database creation or deletion.Database and Table Queries: Practice various queries to interact with your databases, check their structure, and manage them efficiently.This section will challenge your understanding of managing database environments, and you'll answer practical query-based questions to demonstrate your knowledge.Section 2: Table Definition and Data ManipulationCreating and manipulating tables is central to database management. In this section, you'll dive into defining table structures, inserting data, and modifying or deleting existing data. These operations are crucial for real-world applications, so mastering them is essential.Topics:CREATE TABLE: Understand how to create tables by defining columns, datatypes, and constraints.ALTER TABLE: Learn to modify existing table structures by adding or dropping columns, or renaming the table itself.INSERT, UPDATE, DELETE: Practice the commands to insert new data, update existing records, and delete data from tables.This section emphasizes both theory and practical application, with plenty of questions focused on SQL syntax for data manipulation. The challenges will help solidify your understanding of table management and data handling in SQL.Here’s a detailed course description for Comprehensive SQL and Database Management Practice Exam, breaking down each section and its topics:Course DescriptionWelcome to the Comprehensive SQL and Database Management Practice Exam! This course is designed to help you master SQL and database management through a series of practice questions, including multiple-choice, multiple-selection, and true/false questions. With a strong focus on both theory and practical SQL queries, this course will give you the tools you need to excel in SQL interviews, database management tasks, and real-world applications.SQL (Structured Query Language) is the backbone of most modern databases, and mastering it is essential for data manipulation, querying, and managing databases efficiently. This course is packed with questions that cover everything from the fundamentals of database creation to more advanced topics like joins, subqueries, and transaction control.The course is divided into six comprehensive sections, each focusing on different core aspects of SQL and database management.Section 1: Database Creation and ManagementIn this section, you'll learn how to create and manage databases effectively. You’ll cover the fundamental SQL commands to handle databases and tables, ensuring you have a solid foundation in the basics of database management.Topics:CREATE DATABASE and DROP DATABASE: Learn how to create and remove databases using simple SQL commands.SHOW DATABASES and SHOW TABLES: Get comfortable with commands to list all databases and tables in your system.CREATE DATABASE IF NOT EXISTS and DROP DATABASE IF EXISTS: Understand how to handle existing databases, avoid errors, and ensure smooth database creation or deletion.Database and Table Queries: Practice various queries to interact with your databases, check their structure, and manage them efficiently.This section will challenge your understanding of managing database environments, and you'll answer practical query-based questions to demonstrate your knowledge.Section 2: Table Definition and Data ManipulationCreating and manipulating tables is central to database management. In this section, you'll dive into defining table structures, inserting data, and modifying or deleting existing data. These operations are crucial for real-world applications, so mastering them is essential.Topics:CREATE TABLE: Understand how to create tables by defining columns, datatypes, and constraints.ALTER TABLE: Learn to modify existing table structures by adding or dropping columns, or renaming the table itself.INSERT, UPDATE, DELETE: Practice the commands to insert new data, update existing records, and delete data from tables.This section emphasizes both theory and practical application, with plenty of questions focused on SQL syntax for data manipulation. The challenges will help solidify your understanding of table management and data handling in SQL.Section 3: Joins and Data RelationshipsJoins are one of the most powerful features of SQL. In this section, you’ll learn how to combine data from multiple tables, enabling you to pull together complex data sets efficiently.Topics:INNER JOIN: Discover how to retrieve records that have matching values in both tables.LEFT JOIN, RIGHT JOIN, and FULL JOIN: Understand how to get unmatched data from one or both tables when performing joins.CROSS JOIN: Learn about creating Cartesian products with all possible combinations of rows.SELF JOIN: Explore how to join a table to itself to query hierarchical or related data.Joins are a critical part of querying in SQL, and in this section, you’ll practice both theory and query-based questions that push your understanding of data relationships to the next level.Section 4: Subqueries and Advanced Data RetrievalSubqueries, also known as nested queries, are used to perform complex operations in SQL. This section focuses on writing efficient subqueries to handle more sophisticated data retrieval tasks.Topics:Subqueries in SELECT: Learn how to include subqueries within a SELECT statement to filter or retrieve specific data.Subqueries with IN, EXISTS, and comparison operators: Discover how to use subqueries to compare or validate data.Correlated Subqueries: Explore advanced subqueries that refer to columns from the outer query.In this section, you’ll face more intricate questions designed to test your knowledge of how subqueries can be applied in a variety of real-world scenarios.Section 5: Aggregate Functions and SQL Command TypesSQL offers several powerful functions that allow you to perform calculations and summarizations of your data. This section covers essential aggregate functions and command types that help you analyze large datasets efficiently.Topics:COUNT, SUM, AVG, MAX, MIN: Practice using aggregate functions to perform mathematical operations on sets of data.GROUP BY and HAVING: Learn to group your results and apply filters on those groups using aggregate functions.SQL Command Types:DDL (Data Definition Language): Focuses on the commands used to define, alter, and drop database objects.DML (Data Manipulation Language): Learn the commands that allow you to select, insert, update, and delete data.DCL (Data Control Language): Explore commands like GRANT and REVOKE to manage database permissions.TCL (Transaction Control Language): Understand how to manage transactions with commands like COMMIT and ROLLBACK.This section contains practical query-based questions alongside theoretical ones, giving you a comprehensive understanding of how SQL commands are used in day-to-day database management.Section 6: Advanced Database Concepts and Interview PreparationIn this final section, we’ll delve into advanced database topics that are crucial for real-world applications and job interviews. This section is designed to prepare you for technical interviews and higher-level database management tasks.Topics:Normalization: Understand the process of organizing a database to reduce redundancy and improve data integrity.Indexes: Learn how indexes can speed up query performance and how to create and manage them.Views: Discover how views can simplify complex queries and provide a security layer by restricting access to certain data.Stored Procedures and Functions: Study the use of stored procedures and functions to automate complex tasks within the database.Transactions and Transaction Control: Learn how to manage multi-step processes and ensure data integrity using transaction controls like COMMIT, ROLLBACK, and SAVEPOINT.Database Permissions: Explore how to manage permissions with GRANT and REVOKE.This section is designed to challenge you with tricky interview-style questions, combining theory with practical query-based problems to prepare you for real-world scenarios.Conclusion:By the end of this course, you will have gained a deep understanding of SQL and database management. You'll be ready to tackle interview questions, solve complex data problems, and work confidently with databases in any environment.This course offers a Comprehensive approach to SQL and database management, and it’s packed with real-world examples and exercises to ensure you’re fully prepared to handle any SQL-related challenge.