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SQL for Beginners: The Easiest Way to Learn SQL Step by Step

Name: SQL for Beginners: The Easiest Way to Learn SQL Step by Step
Rating: 4.5 (10568 reviews)

Learn SQL by Coding! A Course that You Will Actually Learn SQL Easily with Hundreds of Examples!

Role Play

Created byCode Star Academy, Database Masters | 300,000+ Successful Students Worldwide

Last updated 3/2026

English

What you'll learn

Gain a Solid Foundation in SQL Syntax, Query Structure, and Core Database Concepts
Set Up All Required Tools and Software Quickly with Zero Technical Background
Learn How to Write, Read, and Troubleshoot SQL Queries with Step-by-Step Guidance
Learn How to Think in SQL and Translate Real-World Questions into SQL Queries
Learn Best Practices for Writing Clean, Readable, and Efficient SQL Queries
Improve Your Troubleshooting Skills by Learning How to Fix SQL Errors Easily.
Retrieve, Filter, Sort, and Organize Data Using High Industry-Standard SQL Techniques
Work Confidently with SQL Functions, Aggregations, and Grouping to Analyze Data
Select and Combine Information From Multiple Tables Using JOINs
Understand and Apply Subqueries, Logical Conditions, and Result-Set Operations
Create and Modify tables Using DDL Commands (CREATE, ALTER, DROP)
Practice on Real Datasets to Build Practical Problem-Solving and Data Analysis Skills
Learn How to Add New Records Using the INSERT Command with Examples
Remove Unwanted Records with Confidence Using the DELETE Command
Update and Modify Existing Data Safely Using the UPDATE Command
Learn How to Manage Data Safely Using Transactions (COMMIT and ROLLBACK)
Stay Motivated with Quizzes, AI Role Plays, Hands-on Exercises, and Course Materials
Enjoy Lifetime Access to Dedicated Support and Guidance From the Course Instructors

Coding Exercises

This course includes our updated coding exercises so you can practice your skills as you learn.

Course content

15 sections • 98 lectures • 8h 31m total length

What is the Database?7:37
Why Oracle Database?7:00
What is a Table?3:40
Special Gifts for Our Students0:38
What is a Relational Database?7:52
Entity Relationship Logic in Databases3:46
What is Pluggable Database?3:13
In this lecture, you're going to learn what the pluggable database (multitenant architecture) is in Oracle Database.
The Sample (HR) Schema Used in This Course7:23
What is SQL?5:02

About the Database Installation3:02
The Ways to Get a Database14:50
In this SQL tutorial, the participants will learn how to get a database to proceed with the SQL for Beginners: The Easiest Way to Learn SQL Step by Step course.
Option 1: Downloading The Virtual Machine Image (.ova) File2:08
In this SQL tutorial, the course participants will learn how to download the virtual machine image (OVA) file, set up a fully functional database ready for use.
Option 1: Downloading and Installing VirtualBox3:06
In this SQL tutorial, the course participants will learn how to download and install the VirtualBox virtualization software, enabling them to use the image we downloaded in the previous lesson. This software will provide access to a pre-configured Linux operating system with an installed database, ready for use.
Option 1: Getting Started with VirtualBox: Setup and Configuration5:06
In this SQL tutorial, the course participants will learn how to import the VirtualBox image we downloaded in the previous lesson into the VirtualBox software, ensuring a seamless setup and smooth operation.
Option 1: Configuring SQL Developer for the Virtual Machine11:37
In this SQL tutorial, the course participants will learn how to download and install the SQL Developer tool on their Windows machine, and connect it to a database running on a Linux server that we set up in previous lessons. The advantage of this setup is that we’ll use the pre-configured Linux image solely as the database server, while SQL Developer, installed on Windows, will handle the queries. This configuration enhances both performance and stability, allowing SQL Developer to run faster and more smoothly.
Option 1: Using SQL Developer with Virtual Machines4:09
In this SQL tutorial, the course participants will learn how to use the SQL Developer tool to run queries and follow along with the course content.
Option 1: How to Install VirtualBox on Mac OS X?1:56
Important Note0:42
For the students who succeeded to complete the Option-1
Option 2: Downloading And Installing the Oracle Database18:00
In this lecture, students are going to learn the oracle database 19c installation.
Lecture keywords: "oracle", "oracle sql", "oracle database", "oracle database installation", "oracle database 19c installation".
Option 2: Unlocking the HR Schema7:34
In this lecture, our students are going to learn how to unlock the HR schema to practice throughout the course.
Option 2: Configuring and Using Oracle SQL Developer22:14
This lecture covers how to download and configure Oracle SQL Developer software and how to connect to the Oracle Database 19c.
Option 2: Installing Sample Schemas in Oracle Database7:44
In this SQL tutorial, the course participants will learn about the easiest way how to install Oracle Sample Schemas to be able to work with many database sample schemas provided by Oracle.
Option 3: Using Oracle Live SQL7:40
Option 3: About Oracle Live SQL Restrictions0:23

Basic SQL Statements3:58
In this SQL tutorial, course participants will learn about basic SQL statements that will be used throughout the course.
Lesson Keywords: "sql", "oracle sql", "learn sql", "sql training", "sql course", "oracle database", "sql statements", "basic sql statements".
SQL Coding Tips & Hints!5:46
In this SQL tutorial, the course participants will learn about some tips for SQL coding!
Lesson Keywords: "sql", "oracle sql", "learn sql", "sql training", "sql course", "oracle database", "sql coding", "coding tips", "sql coding tips", "SQL tutorial", "SQL tips".
Let's Describe the Tables!4:47
In this SQL tutorial, the course participants will learn how to describe tables in Oracle SQL using the DESCRIBE and INFO commands. You’ll discover how to view a table’s structure, columns, and data types — an essential step for anyone learning SQL and working with Oracle databases.
Lecture Keywords: sql, oracle sql, learn sql, sql training, sql course, oracle database, oracle tables, describing tables, sql describe command, oracle info command
How to Get Data: The SELECT Statement5:10
You will learn how to retrieve data using the SELECT statement.
Lesson Keywords: "sql", "oracle sql", "learn sql", "sql training", "sql course", "oracle database", "select statement".
Aliasing the Columns5:25
In this SQL tutorial the course participants will learn about how to rename the columns in SQL Select statements using column aliases

Lesson Keywords: "sql", "oracle sql", "learn sql", "sql training", "sql course", "oracle database", "aliasing the columns", "the as keyword".
Getting Unique Rows: The DISTINCT Operator6:10
In this lesson, you will learn how to use SELECT statements effectively to get distinct results in Oracle SQL, and understand why DISTINCT is one of the most useful tools for clean and accurate data querying.
By the end of this lecture, you’ll be confident in writing efficient SQL queries that return only the data you need — no repetitions, just precision.
Lesson Keywords:
"sql", "oracle sql", "learn sql", "sql course", "sql training", "oracle database", "distinct", "distinct operator", "sql distinct", "unique values in sql", "select distinct", "remove duplicates in sql"
Create a SQL Query that will Display All the Unique Values for the Product Status
Concatenation in Oracle SQL4:50
In this SQL tutorial, you’ll learn how to use the Oracle SQL concatenation operator to combine columns, strings, and expressions into a single output. We cover practical examples, best practices, and common use cases.
Arithmetic Operations in SQL4:50
Learn arithmetic operations in SQL programming..

Lesson Keywords: "sql", "oracle sql", "learn sql", "sql training", "sql course", "oracle database","arithmetic functions".
Create a SQL Query to Determine the New Salary Amounts
What is a NULL Value? Is it Dangerous?6:29
What is a NULL Value? Is It Dangerous?
In this SQL tutorial, the course participants learn what a NULL value really means in Oracle SQL and why it’s one of the most misunderstood concepts in database systems.
Many developers assume NULL behaves like zero or an empty value. This mistake can silently break calculations, comparisons, and business logic, leading to incorrect query results and unreliable reports.
We’ll explain how NULL works in SQL, why operations involving NULL often return unexpected results, and what you should consider when writing real-world SQL queries.
By the end of this lesson, you’ll clearly understand why NULL is not harmless and how to handle it correctly to write accurate, predictable, and professional SQL code.
The Data Detective Team: Investigating the Company Database

Getting Data Just We Want: The WHERE Clause!5:33
In this SQL tutorial, the course participants will learn how to control which rows are returned from their queries using the powerful WHERE clause in SQL. We'll explore how to apply different conditions, logical operators, and comparison expressions to filter your data precisely — getting exactly the results you need.
This lesson is ideal for anyone learning SQL or preparing for database projects, as it helps you master one of the most essential aspects of SQL: data filtering.
Lesson Keywords: "oracle sql", "sql where clause", "where clause in sql", "oracle database", "learn sql", "sql training", "sql tutorial", "sql course", "sql beginner", "sql select statement", "sql filtering data", "oracle sql where", "data filtering", "sql query", "database course", "oracle sql tutorial", "learn oracle sql", "sql for beginners", "sql basics".
Comparison Operators5:24
Learn how comparison operators in SQL work and how to use them effectively in the WHERE clause to filter data accurately.
In this lecture, you’ll explore the most common comparison operators, such as =, !=, >, <, >=, and <=, and understand how SQL evaluates comparisons with numbers, text, and dates. You’ll also learn why comparisons involving NULL values behave differently and how this can impact query results.
By the end of this lesson, you’ll be able to write precise and reliable SQL conditions, avoid common comparison mistakes, and build a solid foundation for more advanced filtering techniques in Oracle SQL and standard SQL.
Logical Operators: AND, OR, NOT8:29
Learn how to use logical operators AND, OR, and NOT in SQL to build accurate and flexible conditions in the WHERE clause.
In this lecture, you’ll understand how each logical operator works, how to combine multiple conditions correctly, and how small logic mistakes can completely change query results. You’ll see practical examples using AND vs OR, as well as NOT for excluding data, which are essential skills for SQL developers and Oracle SQL users.
By the end of this lesson, you’ll be able to write clearer, more reliable SQL queries and avoid common logical errors when filtering data in Oracle SQL and standard SQL.
BETWEEN ... AND Operator4:48
Learn how to use the BETWEEN … AND operator in SQL with real-world examples inside the WHERE clause.
In this lecture, you’ll understand how the BETWEEN AND operator works, when to use it, and common mistakes developers make when filtering data by ranges such as dates, salaries, or numeric values. This is a fundamental SQL skill that every SQL developer, Oracle SQL user, and database professional must know.
By the end of this lesson, you will confidently write cleaner and more readable SQL queries using BETWEEN AND in Oracle SQL and standard SQL.
How to Filter Data Using the IN Operator in SQL6:16
Learn how to use the SQL IN operator to write clean, efficient, and professional SQL queries. In this lecture, you’ll understand how the IN clause works, when to use it instead of multiple OR conditions, and how it improves query readability and performance. You’ll practice real-world SQL examples, filter data using single and multiple values, and avoid common beginner mistakes. This lesson is perfect for beginners and intermediate learners who want to master SQL querying and improve database performance.
Create a SQL Query which Returns the Employees who Work as SALES People
Get Me Something "LIKE" This - Using the LIKE Operator8:51
Learn how to use the SQL LIKE operator to search and filter text-based data efficiently. In this SQL tutorial, you’ll explore how the LIKE clause works with wildcard characters such as % and _, and how to perform flexible pattern matching in SQL queries. You’ll practice real-world examples, learn common use cases, and avoid common mistakes when filtering text data. This lesson is ideal for beginners and intermediate learners who want to improve their SQL querying skills and work with dynamic text searches.
Type a SQL Query Returns All the Managers Based on Their Job Titles
How to Search for NULL Values in SQL?3:51
Explore SQL IS NULL and IS NOT NULL with clear, practical examples. Learn how to handle missing data correctly and write cleaner, smarter queries.
Find Managers Earning Under $10,000

What is a Function?3:19
SQL pre-defined functions in Oracle.
Lesson Keywords: "sql", "oracle sql", "learn sql", "sql training", "sql course", "oracle database", "functions", "oracle functions".
Why to Convert Data?7:02
Learn how to convert data.

Lesson Keywords: "sql", "oracle sql", "learn sql", "sql training", "sql course", "oracle database", "converting data", "conversion data".
Conversion Functions2:20
In this lesson, we're going to explain "Conversion Functions".

Lesson Keywords: "sql", "oracle sql", "learn sql", "sql training", "sql course", "oracle database", "conversion", "conversion functions".
Converting to a Character: TO_CHAR Function14:25
In this lesson, we're going to learn how to convert any data type to a character with TO_CHAR function.

Lesson Keywords: "sql", "oracle sql", "learn sql", "sql training", "sql course", "oracle database", "conversion", "conversion functions", "to_char", "to_char function".
Converting to a Date: TO_DATE Function6:50

In this lesson, we're going to learn how to convert data to a date with TO_DATE function.

Lesson Keywords: "sql", "oracle sql", "learn sql", "sql training", "sql course", "oracle database", "conversion", "conversion functions", "to_date", "to_date function".
NULL Value Conversion: NVL Function5:46
Handling the NULL values in SQL

About Single Row Functions1:46
What are the single row functions in SQL
Character Functions11:25
In this lesson, we're going to learn "Character Functions" in SQL.

Lesson Keywords: "sql", "oracle sql", "learn sql", "sql training", "sql course", "oracle database", "single row functions", "character functions".
Number Functions4:52
In this lesson, we're going to learn "Number Functions" in SQL.

Lesson Keywords: "sql", "oracle sql", "learn sql", "sql training", "sql course", "oracle database", "single row functions", "number functions".
Nesting Functions3:38
In this lesson, we're going to learn "Nesting Functions" in SQL.

Lesson Keywords: "sql", "oracle sql", "learn sql", "sql training", "sql course", "oracle database", "single row functions", "nesting functions".
Date Functions6:57
In this lesson, we're going to learn "Date Functions" in SQL.

Lesson Keywords: "sql", "oracle sql", "learn sql", "sql training", "sql course", "oracle database", "single row functions", "date functions".
DECODE Function5:57
Learn how to use Oracle's specific Decode function in SQL.

Lesson Keywords: "sql", "oracle sql", "learn sql", "sql training", "sql course", "oracle database", "single row functions", "decode function".

What are Group Functions?1:41
What are group functions and how to use them in SQL
MAX Function2:04
In this lesson, we're going to explain "MAX Function" in SQL.

Lesson Keywords: "sql", "oracle sql", "learn sql", "sql training", "sql course", "oracle database", "grouping the data", "group functions", "max function".
MIN Function3:23
In this lesson, we're going to learn "MIN Function" in SQL.

Lesson Keywords: "sql", "oracle sql", "learn sql", "sql training", "sql course", "oracle database", "grouping the data", "group functions", "min function".
COUNT() Function4:17
Getting the number of the returning rows in SQL.
In this lesson, we're going to explain "Count Function" in SQL.

Lesson Keywords: "sql", "oracle sql", "learn sql", "sql training", "sql course", "oracle database", "grouping the data", "group functions", "count function".
Type a SQL Query to Fetch the Number of Employees Working as Sales Representatives
AVG Function1:54
In this lesson, we're going to explain "AVG Function" in SQL.

Lesson Keywords: "sql", "oracle sql", "learn sql", "sql training", "sql course", "oracle database", "grouping the data", "group functions", "average function", "avg function".
SUM Function1:45
In this lesson, we're going to explain "SUM Function" in SQL.

Lesson Keywords: "sql", "oracle sql", "learn sql", "sql training", "sql course", "oracle database", "grouping the data", "group functions", "sum function".
Applying Oracle Group Functions in Real-World Scenarios

Let's Group Data: The GROUP BY Clause12:19
This lecture teaches you how to group the data and return one value with using more than one data by these groups

Lesson Keywords: " sql ", " oracle sql ", " learn sql ", " sql training ", " sql course ", " oracle database ", " installing oracle ", " group by "
Let’s Filter Grouped Data: The HAVING Clause2:51
This lecture teaches you how to use HAVING Clause.

Lesson Keywords: " sql ", " oracle sql ", " learn sql ", " sql training ", " sql course ", " oracle database ", " group by " , "having clause".
Type a SQL Query Returns Departments which have more than 25 employees
Grouping Data in Action

What is a Join in SQL?2:44
This lecture teaches you introducing Joins and what does join means in SQL.

Lesson Keywords: " sql ", " oracle sql ", " learn sql ", " sql training ", " sql course ", " oracle database ", " joins" , "oracle joins", "what is join?".
Types of Joins!0:59
This lecture teaches you types of joins in SQL programming language.

Lesson Keywords: " sql ", " oracle sql ", " learn sql ", " sql training ", " sql course ", " oracle database ", " joins" , "oracle joins", "types of joins".
Let's Join Tables!6:41
This lecture teaches you joining tables with using natural join keyword.

Lesson Keywords: " sql ", " oracle sql ", " learn sql ", " sql training ", " sql course ", " oracle database ", " joins" , "joining tables", "natural join".
Join With USING Clause7:10
This lecture teaches you joining tables with using USING clause.
Lesson Keywords: " sql ", " oracle sql ", " learn sql ", " sql training ", " sql course ", " oracle database ", " joins " , " joining tables ", " join with using clause ".
Join with ON Clause3:24
This lecture teaches you joining tables with using ON keyword.

Lesson Keywords: " sql ", " oracle sql ", " learn sql ", " sql training ", " sql course ", " oracle database ", " joins " , " joining tables ", " join with on clause ".
Join A Table with Itself! (Self Joins)4:03
This lecture teaches you joining tables with itself, which is called as self join.

Lesson Keywords: " sql ", " oracle sql ", " learn sql ", " sql training ", " sql course ", " oracle database ", " joins " , " joining tables ", " self join ".
Joining Multiple Tables5:05
This lecture teaches you joining tables with more than two tables

Lesson Keywords: " sql ", " oracle sql ", " learn sql ", " sql training ", " sql course ", " oracle database ", " joins " , " joining tables ", " multiple tables ".
What are the Outer Joins?6:15
This lecture teaches you what are the Outer joins in SQL.

Lesson Keywords: " sql ", " oracle sql ", " learn sql ", " sql training ", " sql course ", " oracle database ", " joins" , "oracle joins", "outer joins".
What are the Left Joins? (Left Outer Joins)3:39
This lecture teaches you what are the left joins in SQL.

Lesson Keywords: " sql ", " oracle sql ", " learn sql ", " sql training ", " sql course ", " oracle database ", " joins" , "oracle joins", "left joins", " left outer joins ".
Create a Report of Customers and their Referrers
What are the Right Joins? (Right Outer Joins)3:26
This lecture teaches you what are the right joins in SQL.

Lesson Keywords: " sql ", " oracle sql ", " learn sql ", " sql training ", " sql course ", " oracle database ", " joins" , " oracle joins ", " right joins ", " right outer joins ".
Full Outer Joins2:24
This lecture teaches you what are the full outer joins in SQL.

Lesson Keywords: " sql ", " oracle sql ", "learn sql ", " sql training ", " sql course ", " oracle database ", " joins" , "oracle joins", "full outer joins".
Cross Joins - Cartesian Product2:38
This lecture teaches you what are the cross joins in SQL programming language (Cartesian Product).

Lesson Keywords: " sql ", " oracle sql ", " learn sql ", " sql training ", " sql course ", " oracle database ", " joins " , " oracle joins ", " cross joins ", " cartesian product ".
Type a SQL Query that Reports the Number of Employees and Average Salaries for Each Department

Requirements

No prior database or programming experience required!

Description

Welcome to the SQL for Beginners: The Easiest Way to Learn SQL Step-by-Step course!

Forget about all the trivial courses, articles, and YouTube videos.

You are looking at a course that you will buy for thousands of US dollars somewhere else.

This course will be continuously getting updated with more lectures, quizzes, and assessments to enhance your knowledge of SQL.

Recent Course Updates:

(Mar 2026) : Installing Oracle Database 23 AI section was added! (Brand New!)
(Jan 2026) : New Coding Exercises added!
(Dec 2025): The COMMIT & ROLLBACK Statements Lectures are added!

What makes this course different?

This course is designed by our SQL Expert instructors who have 25+ years of experience in Databases, Big Data, etc.
This course has a unique teaching style to make you learn SQL by coding easily and quickly.
All SQL topics & concepts are explained with all the details methodically and with a maximum number of examples.
Course topics are not just well-explained, but also supported with many supportive materials & instructors, and many examples.

After enrolling in this course:

You will be able to claim supportive documents, quizzes, and materials provided by course instructors.
You will be able to get support from instructors from the discussion board.
You will be able to access the course community to discuss your SQL questions.
Your questions will be answered immediately.

BENEFITS OF TAKING THIS SQL COURSE:

Knowing SQL can get you a better job or improve the one you have and it provides to earn you $80-120k in the IT Industry. It's a crucial skill that will put you more in demand in the biggest technology companies in the IT industry, and make your software life easier, that's why it's so popular and backed by Oracle.

This course will help you quickly get up to speed with Oracle SQL. I will demystify your query skills and help you understand the essential concepts of how to write SQL codes easily and think analytically about the problems in your company.

NO RISK & MONEY-BACK GUARANTEE!

Finally, there is no risk. You can preview 10% of the course for free. Once you enroll in the course, if for some reason you are not happy with the course, Udemy offers a 30-day money-back guarantee.

This means you have nothing to lose, sign up now for this course and learn how to write SQL code easily from scratch to master level!

Who this course is for:

Anyone Who Wants to Learn SQL from Scratch
University or College Students
Graduates or Working Professionals
Beginner to Intermediate SQL Learners
Data Analysts, BI Developers, Testers, or Anyone Moving Into Data Roles
Any Software Developers Working with SQL or Oracle Databases

SQL for Beginners: The Easiest Way to Learn SQL Step by Step

What you'll learn

Explore related topics

Coding Exercises

Course content

Database Concepts9 lectures • 46min

Preparation for SQL Development15 lectures • 1hr 50min

Entering the Database!10 lectures • 47min

Conditional Retrieval7 lectures • 43min

Converting Data & Conversion Functions6 lectures • 40min

Ordering SQL Query Results2 lectures • 12min

Single Row Functions6 lectures • 35min

Grouping the Data (Group Functions)7 lectures • 15min

Grouping the Data3 lectures • 15min

Selecting From Multiple Tables (Joins)12 lectures • 48min

Requirements

Description

Who this course is for: