Free SQL Courses

Learn SQL For Free Online & Get Completion Certificates

SQL, a structured query language, simplifies data manipulation, sorting, and retrieval from relational databases. As the industrial world becomes increasingly data-driven, SQL has become a critical skill not only for data analysts but also in fields like marketing and business.

Skills Covered

• SQL Commands: Master essential commands such as CREATE, SELECT, UPDATE, INSERT, COMMIT, and ROLLBACK.

• Database Management: Learn to create and manage databases efficiently.

• Data Retrieval and Manipulation: Develop skills in sorting, retrieving, and modifying data within databases.

• SQL Optimization: Understand how SQL queries are processed and optimized for performance.

Who Should Take Our Free SQL Courses?

• Aspiring Data Analysts: Build foundational to advanced SQL skills crucial for data analysis roles.

• Marketing and Business Professionals: Gain valuable insights into data manipulation to better understand market trends and business metrics.

• Beginners in Database Technology: Start from scratch and gradually progress to complex SQL functionalities.

• IT Professionals and Developers: Enhance your database management capabilities and integrate SQL skills with software development.

What Will You Learn?

• Fundamentals of SQL: Introduction to the basics of SQL and relational database management systems.

• Advanced SQL Techniques: Dive deeper into complex SQL queries and data analytics tools.

• Real-World Applications: Apply your SQL knowledge to real-world scenarios to solve business problems and enhance data security.

• Interactive Learning Experience: Engage in hands-on practice through guided projects and interactive video lectures.

Essential SQL commands 

CREATE DATABASE statement

It helps you to create the database.

Syntax: CREATE DATABASE database_name;

SELECT statement

Reads the data in the database and presents it as the output to the user.

Syntax:
SELECT column_name1,...,column_nameN
FROM table_name
WHERE condition;

UPDATE statement

 This statement is used to modify the stored data on the database.

Syntax: 

UPDATE table_name
SET column_name1 = new_value1,..., column_nameN = new_valueN
WHERE condition;

INSERT INTO statement

 It helps to insert data into the existing table of the database.

Syntax:
INSERT INTO table_name
  (
    Column_name1, …, column_nameN
  )

  VALUES
  (

value1,...,valueN
);

COMMIT statement

It saves the changes permanently. It is usually done in transactions of the SQL database.

ROLLBACK statement

It helps to undo the transactions or operations that are not saved to the database.

SQL in Practice

SQL operations are optimized by the SQL engine to process commands efficiently, involving components like query dispatcher and optimization engines. SQL supports relational database management systems (RDBMS) like Oracle and MS SQL Server. 

Advantages of using SQL 

• Programming isn’t required

• Queries are processed at high speed, which supports portability 

• It is a standardized language

• It is an interactive language

• It supports more than one data view

Benefits of Learning SQL

• For professionals, learning SQL enhances data management skills, problem-solving abilities, and understanding of data operations. 

• Organizations benefit from improved data analysis, enhanced security, and increased data accuracy.

Join Great Learning’s free SQL courses covering crucial concepts from basics to advanced levels, and earn certificates upon completion. For deeper engagement, explore Great Learning’s Best Software Development Courses for hands-on experience and further certificate.