SQL
bestseller

Name: SQL Course and Certification
Price: 36 USD

with Martin Ganchev and Vladimir Saev

4.8/5

(4,666)

Become proficient in SQL and manage relational databases with confidence

11 hours of content 127981 students

Start for Free

What you get:

11 hours of content
96 Interactive exercises
55 Coding exercises
162 Downloadable resources
World-class instructor
Closed captions
Q&A support
Future course updates
Course exam
Certificate of achievement

SQL
bestseller

A course by Martin Ganchev and Vladimir Saev

Start for Free

What you get:

11 hours of content
96 Interactive exercises
55 Coding exercises
162 Downloadable resources
World-class instructor
Closed captions
Q&A support
Future course updates
Course exam
Certificate of achievement

$99.00

Lifetime access

Buy now

Start for Free

What you get:

11 hours of content
96 Interactive exercises
55 Coding exercises
162 Downloadable resources
World-class instructor
Closed captions
Q&A support
Future course updates
Course exam
Certificate of achievement

What You Learn

Acquire essential SQL skills to become a data analyst, data scientist, or data engineer
Learn database fundamentals and essential SQL theory, and how to apply them in real-world situations
Retrieve and analyse data in SQL
Adopt SQL best practices taught by a senior programmer
Create relational databases and work with them effortlessly
Install MySQL Server and MySQL Workbench on your machine

Top Choice of Leading Companies Worldwide

Industry leaders and professionals globally rely on this top-rated course to enhance their skills.

Course Description

SQL is one of the fundamental programming languages you need to learn to work with databases. When you are a data scientist in a company and you need data to perform your analysis, you usually have two options: extract it on your own or contact the IT team. Of course, the ability to extract your own data is an extremely valuable skill to have. In this course, we will teach you everything you need to know in terms of database management and creating SQL queries.

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1.1 Welcome to SQL

4 min

1.2 Why SQL?

3 min

1.4 Why MySQL?

2 min

1.6 Introduction to databases

5 min

2.1 SQL as a declarative language

2 min

2.2 Data definition language (DDL)

4 min

Curriculum

1. Introduction to Databases, SQL, and MySQL

4 Lessons 14 Min

Whether you are working in business intelligence (BI), data science, database administration, or back-end development, you will have to retrieve information from a server storing large amounts of data. To achieve this, you need SQL. The relational database management system we chose for this course is MySQL. We did that because MySQL is open-source, reliable, and mature. In one of the videos of this section, we will provide you with step-by-step guidance when you install MySQL Server and MySQL Workbench. The introductory part of this course pays significant attention to database theory. You will learn the meaning of terms like database, data table, data entity, record, field, relation, and more.

Welcome to SQL
4 min
Why SQL?
3 min
Why MySQL?
2 min
Introduction to databases
5 min
2. SQL Theory

6 Lessons 20 Min

In this section, we study the components of the Structured Query Language, SQL. We will focus on the following syntaxes: Data Definition Language (DDL), Data Manipulation Language (DML), Data Control Language (DCL), and Transaction Control Language (TCL). In addition, we will introduce you to the concept of using SQL Keywords.

SQL as a declarative language
2 min
Data definition language (DDL)
4 min
SQL keywords
1 min
Data manipulation language (DML)
5 min
Data control language (DCL)
5 min
Transaction control language (TCL)
3 min
3. Basic Database Terminology

7 Lessons 34 Min

We are sure that you will be many times more efficient and precise in producing your SQL queries if you are in good command of basic database terminology. At the end of the day, that's why SQL has been created: to help you store, retrieve, and manipulate data from relational databases. So, knowing exactly what a relational database is and understanding the meaning of terms like 'relational schema,' 'primary key,' 'foreign key,' 'unique key,' and 'entity relationships' is something that is crucial for giving you confidence and precision in your work with SQL.

Relational database essentials
5 min
Databases vs spreadsheets
7 min
Database terminology
4 min
Relational schemas - Primary key
5 min
Relational schemas - Foreign key
5 min
Relational schemas - Unique key and null values
3 min
Relationships
5 min
4. Installing MySQL and Getting Acquainted with the Interface

8 Lessons 30 Min

In this section, we will provide you with step-by-step guidance on how to install MySQL Server and MySQL Workbench, the two components you need in order to start working with MySQL. Then, you'll need to set up a connection between Workbench and the server. Of course, we will show you how to do that, and then we will conclude by making a quick tour of the MySQL Workbench interface. What you will see in these lectures will be more than enough of a preparation for working with the software before you start coding in the next section.

Installing MySQL
11 min
Additional note – Installing – Visual C Read now
1 min
Installing MySQL on macOS and Unix systems Read now
2 min
The Client-Server Model Read now
1 min
Setting up a connection
3 min
Important - Please read Read now
1 min
New Authentication Plugin - Creating a New User
6 min
Introduction to the MySQL interface
5 min
5. First Steps in SQL

16 Lessons 46 Min

It is time to create your first database and make your first steps in SQL. In this section, we will introduce you to string, fixed- and floating-point, and other useful data types. You will learn how to create a database table and how to use such a table. Not only that, but we will also introduce the different types of constraints that can be assigned to tables (primary key, foreign key, unique key, default, not null, and other types of constraints)

Creating a Database - Part I
5 min
Creating a Database - Part I - Exercise Read now
1 min
SQL files Read now
1 min
Creating a Database - Part II
2 min
Creating a Database - Part II - Еxercise Read now
1 min
Introduction to data types
2 min
String data types
5 min
Integers
4 min
Fixed and floating-point data types
6 min
Other useful data types
6 min
Creating a table
5 min
Creating a table - Exercise Read now
1 min
Using databases and tables
3 min
Using databases and tables - Exercise Read now
1 min
Additional notes on using tables
2 min
Additional notes on using tables - Exercise Read now
1 min
6. MySQL Constraints

12 Lessons 38 Min

So far, you've been acquainted with crucial theoretical topics and fundamentals in coding in MySQL. In this section, both will come together to show you how primary keys, foreign keys, and unique keys are applied in practice through MySQL Constraints. Once you have mastered these three, we will continue with other types of constraints that you will encounter daily in your work, such as the DEFAULT Constraint and the NOT NULL Constraint.

PRIMARY KEY constraint
5 min
PRIMARY KEY constraint- Exercise Read now
1 min
FOREIGN KEY constraint - Part I
5 min
FOREIGN KEY constraint - Part II
5 min
FOREIGN KEY constraint - Part II - Exercise Read now
1 min
UNIQUE Constraint
5 min
UNIQUE Constraint - Code Read now
1 min
DEFAULT Constraint
5 min
DEFAULT Constraint - Code Read now
1 min
NOT NULL Constraint - Part I
6 min
NOT NULL Constraint - Part I - Code Read now
1 min
NOT NULL Constraint - Part II
2 min
7. SQL Best Practices

2 Lessons 10 Min

There are many ways you can write your SQL code, but there are only a few that are considered professional. In this part of the course, we will teach you how to write professional code and how to adhere to professional best practices. To reinforce what you have learned, we will wrap up this section with an easy-to-understand practical example.

Coding techniques and best practices - Part I
6 min
Coding techniques and best practices - Part II
4 min
8. Loading the Data

2 Lessons 3 Min

One of the best features of our SQL training is that it uses a real-life database – the “Employees” database. We will use it to manipulate data in MySQL in all lessons. In this chapter, you will download the SQL file and will run it in Workbench.

Loading the 'employees' database
2 min
Loading the 'employees' database - Link Read now
1 min
9. SQL SELECT STATEMENT

39 Lessons 89 Min

When doing analysis with SQL, regardless of whether in that moment you are working on the administration of your relational database, on a business intelligence analysis, or are doing some preliminary work in the data science field, you will be constantly dealing with the SQL SELECT Statement. We cannot stress enough how important it is to have completely internalized the structure of this particular SQL statement. That's why, in this section, we will make sure you will learn and practice all the fundamentals of the SELECT Statement. We won't let you proceed before you feel comfortable using it.

SELECT… FROM…
5 min
SELECT - FROM - Exercise Read now
1 min
What to Expect from the Upcoming Course Coding Exercises Read now
1 min
WHERE
3 min
WHERE - Exercise Read now
1 min
AND
2 min
AND - Exercise Read now
1 min
OR
4 min
OR - Exercise Read now
1 min
Operator Precedence
4 min
Operator Precedence - Exercise Read now
1 min
IN - NOT IN
3 min
IN - NOT IN - Exercise Read now
1 min
LIKE - NOT LIKE
4 min
LIKE - NOT LIKE - Exercise Read now
1 min
Wildcard Characters
2 min
Wildcard Characters - Exercise Read now
1 min
BETWEEN… AND…
2 min
BETWEEN - AND - Exercise Read now
1 min
IS NOT NULL - IS NULL
2 min
IS NOT NULL - IS NULL - Exercise Read now
1 min
Other Comparison Operators
5 min
Other Comparison Operators - Exercise Read now
1 min
SELECT DISTINCT
2 min
SELECT DISTINCT - Exercise Read now
1 min
Introduction to Aggregate Functions
5 min
Introduction to Aggregate Functions - Exercise Read now
1 min
ORDER BY
4 min
ORDER BY - Exercise Read now
1 min
GROUP BY
6 min
Using Aliases (AS)
2 min
Using Aliases (AS) - Exercise Read now
1 min
HAVING
3 min
HAVING - Exercise Read now
1 min
WHERE vs HAVING - Part I
4 min
WHERE vs HAVING - Part II
3 min
WHERE vs HAVING - Exercise 2 Read now
1 min
LIMIT
5 min
LIMIT - Exercise Read now
1 min
10. SQL INSERT Statement

5 Lessons 14 Min

Apart from delivering the segment of the data you need from your database through the SELECT Statement, SQL also gives you the chance to manipulate your data. The Data Manipulation Language, DML, is the part of the SQL syntax that contains the commands that will allow you to do that. In this section, we will focus on the INSERT Statement, which is obviously about inserting data to a table from your database.

The INSERT statement - Part I
6 min
The INSERT statement - Part II
2 min
Inserting Data INTO a New Table
4 min
The INSERT statement - Part II - Exercise Read now
1 min
Inserting Data INTO a New Table - Exercise Read now
1 min
11. SQL UPDATE Statement

4 Lessons 10 Min

Still on the subject of manipulating your data set, in this section we will focus on another DML Statement: the UPDATE Statement. Sometimes you won't need to insert new data, but you will want to correct or update some of the existing data in your database. That's why you have the UPDATE Statement, which is there just for that!

TCL's COMMIT and ROLLBACK
3 min
The UPDATE Statement - Part I
3 min
The UPDATE Statement - Part II
3 min
The UPDATE Statement - Part II - Exercise Read now
1 min
12. SQL DELETE Statement

4 Lessons 9 Min

A bit trickier than the SQL INSERT and UPDATE Statements is the SQL DELETE Statement. Yes, it definitely is about removing information from your data set, but you must be prudent when using it. First, you risk losing data that you might actually need, and second, you shouldn't confuse it with the DROP and TRUNCATE statements. This section is devoted to clarifying all these subject matters.

The DELETE Statement - Part I
4 min
The DELETE Statement - Part II
1 min
The DELETE Statement - Part II - Exercise Read now
1 min
DROP vs TRUNCATE vs DELETE
3 min
13. MySQL Aggregate Functions

14 Lessons 26 Min

Aggregate functions come in handy when we want to perform some arithmetic operations with the data in our database. The most commonly-used aggregate functions in SQL are COUNT(), SUM(), MIN(), MAX(), and AVG().

COUNT()
4 min
COUNT() - Exercise Read now
1 min
SUM()
2 min
SUM() - Exercise Read now
1 min
MIN() and MAX()
1 min
MIN() and MAX() - Exercise Read now
1 min
AVG()
2 min
AVG() - Exercise Read now
1 min
ROUND()
2 min
ROUND() - Exercise Read now
1 min
COALESCE() - Preamble Read now
1 min
IFNULL() and COALESCE()
6 min
Another Example of Using COALESCE()
2 min
Another Example of Using COALESCE() - Exercise Read now
1 min
14. SQL JOINs

24 Lessons 82 Min

Joins are one of the most powerful and frequently-used tools in SQL. This is a tool you will need when combining the information from two or more tables. After completing this section, you will be able to use inner, left, right, and cross joins.

Introduction to JOINs
4 min
Introduction to JOINs - Exercise Read now
1 min
INNER JOIN - Part I
6 min
INNER JOIN - Part II
6 min
INNER JOIN - Part II - Exercise Read now
1 min
A Note on Using Joins
4 min
Duplicate Records
4 min
LEFT JOIN - Part I
5 min
LEFT JOIN - Part II
6 min
LEFT JOIN - Part II - Exercise Read now
1 min
RIGHT JOIN
5 min
The new and the old join syntax
4 min
The new and the old join syntax - Exercise Read now
1 min
JOIN and WHERE Used Together
3 min
JOIN and WHERE Used Together - Exercise Read now
1 min
CROSS JOIN
8 min
CROSS JOIN - Exercise Read now
1 min
Using Aggregate Functions with Joins
2 min
JOIN more than two tables in SQL
4 min
JOIN more than two tables in SQL - Exercise Read now
1 min
Tips and tricks for joins
6 min
Tips and tricks for joins - Exercise Read now
1 min
UNION vs UNION ALL
6 min
UNION vs UNION ALL - Exercise Read now
1 min
15. SQL Subqueries

6 Lessons 20 Min

Here, you will learn how to write subqueries, a key SQL tool for more advanced users. The section also includes a number of useful tips and tricks and aims to take your SQL skills to the next level.

SQL Subqueries with IN nested inside WHERE
5 min
SQL Subqueries with IN nested inside WHERE - Exercise Read now
1 min
SQL Subqueries with EXISTS-NOT EXISTS nested inside WHERE
4 min
SQL Subqueries with EXISTS-NOT EXISTS nested inside WHERE - Exercise Read now
1 min
SQL Subqueries nested in SELECT and FROM
8 min
SQL Subqueries nested in SELECT and FROM - Exercise Text Read now
1 min
16. SQL Self Join

1 Lesson 8 Min

Joins are one of the most powerful and frequently-used tools in SQL. This is a tool you will need when combining the information from two or more tables. After completing this section, you will be able to use inner, left, right, and cross joins.

SQL Self Join
8 min
17. SQL Views

2 Lessons 8 Min

The focus of this part of the course is the SQL View. A view in SQL is a virtual table whose contents are obtained from an existing table or tables. Using this, SQL Tools has several advantages that will all be discussed in this lecture.

Using SQL views
7 min
Using SQL views - Exercise Read now
1 min
18. Stored Routines

14 Lessons 49 Min

Stored routines are a set of SQL statements that have been pre-written and stored on a server, allowing users to re-run them at a later stage. You will learn how to create your own stored procedures and functions.

Introduction to Stored Routines
3 min
The MySQL syntax for stored procedures
5 min
Stored Procedures - Example - Part I
3 min
Stored Procedures - Example - Part II
5 min
Another Way to Create a Procedure in MySQL
3 min
Stored Procedures - Example - Part II - Exercise Read now
1 min
Stored Procedures with an Input Parameter
6 min
Stored Procedures with an Output Parameter
3 min
Variables
7 min
Stored Procedures with an Output Parameter - Exercise Read now
1 min
User-defined functions in MySQL
6 min
Variables - Exercise Read now
1 min
Stored routines - conclusion
4 min
User-defined functions in MySQL - Exercise Read now
1 min
19. Advanced SQL Topics

11 Lessons 45 Min

In the last part of the training, you will learn advanced SQL topics like local variables, session variables, global variances, MySQL triggers, MySQL indexes, and the CASE Statement.

Types of MySQL Variables - Local Variables
5 min
Session Variables
5 min
Global Variables
2 min
User-Defined vs System Variables
4 min
MySQL Triggers - Preamble Read now
1 min
MySQL Triggers
12 min
MySQL Triggers - Exercise Read now
1 min
MySQL Indexes
7 min
MySQL Indexes - Exercise Text Read now
1 min
The CASE Statement
6 min
The CASE Statement - Exercise Text Read now
1 min

Topics

SQLTheoryProgrammingRelational DatabasesETLDatabase TheoryData EngineeringData PreprocessingProgramming

Tools & Technologies

Course Requirements

No prior SQL experience or knowledge is required. We will start this SQL course from the basics and gradually build your understanding. Everything you need is included in the course
We will teach you how to install MySQL Workbench

Who Should Take This Course?

Level of difficulty: Beginner

Aspiring data analysts, data scientists, data engineers who want to improve their job prospects
Existing data analysts, data scientists, data engineers who want to improve their SQL skills
Business professionals who want to query company data on their own to make data-driven decisions
Everyone who wants to work with data whether for personal projects, academic research, or enhancing their skill set for career advancement

Exams and Certification

A 365 Data Science Course Certificate is an excellent addition to your LinkedIn profile—demonstrating your expertise and willingness to go the extra mile to accomplish your goals.

Meet Your Instructor

Martin Ganchev

Worked at

15 Courses

37350 Reviews

552675 Students

Martin began working with 365 in 2016 as the company’s second employee. Martin’s resilience, hard-working attitude, attention to detail, and excellent teaching style played an instrumental role in 365’s early days. He authored some of the firm’s most successful courses. And besides teaching, Martin dreams about becoming an actor. In September 2021, he enrolled in an acting school in Paris, France.