DP-900 Relational database Practice Question
A developer is designing a new application that requires a relational database. The database must support complex queries and stored procedures. Which Azure data service should they choose?
⚠ Common exam trap
DP-900 often tests the boundary between relational and non-relational services — the trap is that Cosmos DB advertises 'SQL API' syntax, leading candidates to incorrectly assume it is a relational database with stored procedures.
Answer choices
Why each option matters
Answer the question above first, then reveal the full breakdown to understand why each option is right or wrong.
Correct answer & explanation
✓
Azure SQL Database
Azure SQL Database is a fully managed relational database platform (PaaS) built on the SQL Server engine, supporting T-SQL, complex joins, views, stored procedures, and transactions. It is the correct choice for applications requiring relational modeling with advanced query capabilities.
Answer analysis
Option-by-option breakdown
For each option: why learners choose it and why it is or isn't the right answer here.
- ✓
Azure SQL Database
Why this is correct
Azure SQL Database is a fully managed relational database service that supports schema enforcement, primary and foreign keys, T-SQL queries, stored procedures, and ACID transactions. For an application that requires relational storage, it gives direct support for complex joins, indexed views, and fine-grained permissions out of the box.
- ✗
Azure Table Storage
Why it's wrong here
Azure Table Storage is a NoSQL key-value store where data is partitioned by partition key and row key and accessed by those keys. Because it does not expose a relational engine, it cannot enforce referential integrity, perform joins across tables, or execute stored procedures, so it is unsuited for an application with relational requirements.
- ✗
Azure Cosmos DB
Why it's wrong here
Azure Cosmos DB is a globally distributed, multi-model NoSQL database supporting document, graph, and key-value APIs. Although its SQL API may look like SQL, it operates on JSON documents rather than related tables and lacks full relational features such as cross-table foreign keys and complex query optimizer-based joins, making it only a superficially query language-compatible option.
- ✗
Azure Blob Storage
Why it's wrong here
Azure Blob Storage is an object storage service optimized for storing unstructured data such as images, videos, and log files in blobs and containers. It provides no query engine, no schema, and no ability to create stored procedures, and retrieving specific fields requires client-side application logic, so it cannot satisfy relational database access requirements.
Go deeper
Related to this question
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Azure SQL Managed Instance and SQL VM
Key term
Relational database
A relational database organizes data into tables with rows and columns, where each table relates to others using unique keys, allowing efficient storage, retrieval, and manipulation of structured information.
Key term
Azure SQL Database
Azure SQL Database is a fully managed relational database-as-a-service (DBaaS) in Microsoft Azure, based on the SQL Server engine, that handles scaling, backups, patching, and high availability automatically.
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Written and reviewed by Johnson Ajibi, MSc IT Security
Senior Network & Security Engineer · founder of Courseiva
Last reviewed September 2026 · checked against the official Microsoft exam blueprint
This DP-900 practice question is part of Courseiva's free Microsoft certification practice question bank. Courseiva provides original exam-style practice questions with explanations, topic-based practice, mock exams, readiness tracking, and study analytics to help learners prepare for the DP-900 exam.