• SQL Tutorials

    SQL is an intuitive programming language with broad application scope, so solid SQL skills are essential for any data scientist. With our hands-on tutorials, you can learn the basics of SQL for free and build your relational database knowledge.

    Featured Articles

    What Are Duplicate Records in SQL?

    SQL Tutorials

    What Are Duplicate Records in SQL?

    Duplicate records in SQL, also known as duplicate rows, are identical rows in an SQL table. This means the values in each column coincide.

    by Martin Ganchev 5 min read
    How to Create an Inner Join in SQL

    SQL Tutorials

    How to Create an Inner Join in SQL

    by Martin Ganchev 11 min read
    Relationships between Tables in SQL

    SQL Tutorials

    Relationships between Tables in SQL

    by Martin Ganchev 6 min read

    All Articles

    TCL Statements in SQL: How to Manage Database Transactions?

    SQL Tutorials

    TCL Statements in SQL: How to Manage Database Transactions?

    by The 365 Team 6 min read
    DCL In a Nutshell: A Brief Look into the SQL Data Control Language

    SQL Tutorials

    DCL In a Nutshell: A Brief Look into the SQL Data Control Language

    by Martin Ganchev 5 min read
    A Beginner’s Guide to DML in SQL

    SQL Tutorials

    A Beginner’s Guide to DML in SQL

    by Martin Ganchev 4 min read
    Getting Started with DDL in SQL: A Brief Overview

    SQL Tutorials

    Getting Started with DDL in SQL: A Brief Overview

    by Martin Ganchev 4 min read
    Basic Database Terminology

    SQL Tutorials

    Basic Database Terminology

    by Martin Ganchev 4 min read
    Database vs Spreadsheet: What’s the Difference?

    SQL Tutorials

    Database vs Spreadsheet: What’s the Difference?

    by Martin Ganchev 7 min read
    What Are Joins?

    SQL Tutorials

    What Are Joins?

    by Martin Ganchev 5 min read
    MySQL vs PostgreSQL: An Open Source Battle

    SQL Tutorials

    MySQL vs PostgreSQL: An Open Source Battle

    by The 365 Team 7 min read
    How to Use SQL’s Limit Statement?

    SQL Tutorials

    How to Use SQL’s Limit Statement?

    by Martin Ganchev 7 min read
    Solving a Business Task in SQL and Visualizing it in Tableau

    SQL Tutorials

    Solving a Business Task in SQL and Visualizing it in Tableau

    by Martin Ganchev 17 min read
    How to Set up a Database in SQL

    SQL Tutorials

    How to Set up a Database in SQL

    by Martin Ganchev 5 min read
    Data Manipulation: Integrating SQL and Tableau

    SQL Tutorials

    Data Manipulation: Integrating SQL and Tableau

    by Martin Ganchev 5 min read
    When to Use the SQL CASE Statement

    SQL Tutorials

    When to Use the SQL CASE Statement

    by Martin Ganchev 9 min read
    Working with Indexes in MySQL

    SQL Tutorials

    Working with Indexes in MySQL

    by Martin Ganchev 9 min read
    Introduction to SQL Views

    SQL Tutorials

    Introduction to SQL Views

    by Martin Ganchev 9 min read

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