AZ-900 Lesson 10 – Azure Database Services

AZ-900 Lesson 10 – Azure Database Services: Azure SQL, Cosmos DB, and More

In this lesson of the AZ-900 Azure Fundamentals series, we explore the main database services you need to know for the exam:
Azure SQL Database
Azure Cosmos DB
Other managed databases (Azure SQL Managed Instance, Azure Database for PostgreSQL, Azure Database for MySQL)

We start by revisiting the difference between relational and non-relational (NoSQL) databases, then map those concepts to Azure services.

In this video, you will learn:
What a relational database is (tables, rows, columns, SQL) and when it is a good fit
What a non-relational / NoSQL database is and when flexible schemas and high scalability are needed
How Azure SQL Database provides a fully managed relational Database as a Service based on SQL Server
How Azure Cosmos DB offers a globally distributed, multi-model NoSQL platform with low-latency access across regions

What other managed database services exist in Azure (SQL Managed Instance, PostgreSQL, MySQL) and when to use them

We also walk through exam-style scenarios to help you choose the right service:
“Managed relational SQL database in Azure without managing VMs” → Azure SQL Database
“Globally distributed, low-latency NoSQL database for JSON documents” → Azure Cosmos DB
“Move existing PostgreSQL or MySQL workloads to a managed service” → Azure Database for PostgreSQL / MySQL
“Need a highly compatible SQL Server environment in Azure” → Azure SQL Managed Instance

This lesson is:
Exam-oriented, aligned with the AZ-900 objective “Describe Azure database and analytics services”
Beginner-friendly, with clear explanations and no deep DBA knowledge required
Practical, focused on real use cases and how to recognize each service in questions

🔹 After watching this video, you will be able to:
Explain the difference between relational and NoSQL databases in the context of Azure
Describe Azure SQL Database and Azure Cosmos DB at a high level
Map common requirements to the correct Azure database service in AZ-900 scenarios

👉 This video closes the Azure Architecture & Services playlist in the AZ-900 Azure Fundamentals series and prepares you to move on to management, governance, security, and cost topics.

If this lesson helps you, please like, subscribe, and continue to the next playlists to complete your AZ-900 preparation. 💡