Azure SQL is used for extracting and organizing data that is stored in a relational database. In this course, you'll learn how to recognize and apply data querying techniques using SQL, Data Definition Language, and Data Manipulation Language. You’ll start by learning about Structured Query Language including its uses, features, and limitations. You’ll examine how to work with the Data Definition Language and Data Manipulation Language. Next, you'll learn how to query Azure SQL Database using the Azure portal, SSMS, Data Studio, and the sqlcmd utility. Finally, you'll discover how to query relational data in PostgreSQL, MySQL, and MariaDB. This course is one in a series that prepares learners for the Microsoft Azure Data Fundamentals (DP-900) exam.