Quick Answer
The answer is Azure Database for PostgreSQL with the Oracle compatibility extension. This service is correct because it leverages the orafce extension to support Oracle PL/SQL stored procedures and syntax, enabling migration from Oracle to Azure with minimal code changes. On the AZ-305 exam, this scenario tests your ability to match migration requirements—specifically preserving PL/SQL logic and PostgreSQL compatibility—against Azure’s database portfolio, where traps often steer you toward Azure SQL Database or SQL Managed Instance, which lack native Oracle procedural language support. The key distinction is that PostgreSQL’s extension model directly addresses the need for minimal re-engineering of Oracle workloads, while other services would require significant refactoring. Memory tip: think “Orafce for Oracle-friendly PostgreSQL”—if the question emphasizes PL/SQL and minimal changes, look for the PostgreSQL option with the compatibility extension.
This AZ-305 practice question tests your understanding of design data storage solutions. Match the stated requirement to the specific cloud service, access model, or configuration option — many options are valid in isolation but not for this scenario. After answering, compare your reasoning against the explanation and wrong-answer breakdown below. Once you have made your selection, read the full explanation to reinforce the concept and understand why each distractor is designed to mislead on exam day.
An organization is migrating on-premises Oracle databases to Azure. They require minimal code changes and support for Oracle PL/SQL stored procedures. Which Azure data service best meets these requirements?
Clue words in this question
Noticing these words before you look at the options changes how you read each choice.
Clue: "best"
Why it matters: Signals that multiple options may be partially correct. Choose the option that most directly solves the exact problem described, not the one that sounds most complete.
Azure Database for MySQL
Why wrong: Different SQL dialect, not PL/SQL.
Azure Database for PostgreSQL with Oracle compatibility
Supports PL/SQL with extension.
Azure SQL Database
Why wrong: Uses T-SQL, not PL/SQL.
Azure Cosmos DB
Why wrong: NoSQL, no stored procedure support.
Answer choices
Answer the question above first, then reveal the full breakdown to understand why each option is right or wrong.
Correct answer & explanation
Azure Database for PostgreSQL with Oracle compatibility
Azure Database for PostgreSQL with the Oracle compatibility extension (e.g., orafce) provides support for Oracle PL/SQL stored procedures and syntax, minimizing code changes during migration. This service is designed to handle Oracle workloads with minimal re-engineering, unlike other Azure database options that lack native Oracle compatibility.
Key principle: Answer the scenario, not the keyword: identify the specific constraint before choosing the most familiar-sounding option.
Answer analysis
For each option: why learners choose it and why it is or isn't the right answer here.
Azure Database for MySQL
Why it's wrong here
Different SQL dialect, not PL/SQL.
Azure Database for PostgreSQL with Oracle compatibility
Why this is correct
Supports PL/SQL with extension.
Clue confirmation
The clue word "best" in the question point toward this answer.
Related concept
Read the scenario before looking for a memorised answer.
Azure SQL Database
Why it's wrong here
Uses T-SQL, not PL/SQL.
Azure Cosmos DB
Why it's wrong here
NoSQL, no stored procedure support.
Common exam traps
The trap here is that candidates often assume Azure SQL Database is the natural choice for Oracle migrations due to its relational nature, but it lacks native PL/SQL support, whereas PostgreSQL with Oracle compatibility is the correct service for minimizing code changes.
Detailed technical explanation
The Oracle compatibility extension in Azure Database for PostgreSQL leverages the orafce extension, which implements Oracle-compatible functions, data types, and PL/SQL-like procedural language support (e.g., DBMS_OUTPUT, UTL_FILE). This allows stored procedures written in Oracle's PL/SQL to run with minimal changes by mapping Oracle-specific constructs to PostgreSQL equivalents. In real-world migrations, this reduces the need for manual code refactoring, especially for complex business logic embedded in stored procedures.
Key takeaway
Answer the scenario, not the keyword: identify the specific constraint before choosing the most familiar-sounding option.
Real-world example
A cloud solutions architect for a retail company is evaluating services for a new workload. The correct answer here reflects best practice for the specific scenario described — not a general cloud recommendation. Answer the scenario, not the keyword: identify the specific constraint before choosing the most familiar-sounding option. Cloud exam questions reward reading the constraint carefully: the same technology can be right or wrong depending on the use case.
What to study next
Identify which exam domain this question belongs to, review the core concept, then practise similar questions from the same domain.
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FAQ
Design data storage solutions — This question tests Design data storage solutions — Read the scenario before looking for a memorised answer..
The correct answer is: Azure Database for PostgreSQL with Oracle compatibility — Azure Database for PostgreSQL with the Oracle compatibility extension (e.g., orafce) provides support for Oracle PL/SQL stored procedures and syntax, minimizing code changes during migration. This service is designed to handle Oracle workloads with minimal re-engineering, unlike other Azure database options that lack native Oracle compatibility.
Identify which exam domain this question belongs to, review the core concept, then practise similar questions from the same domain.
Yes — watch for: "best". Signals that multiple options may be partially correct. Choose the option that most directly solves the exact problem described, not the one that sounds most complete.
Read the scenario before looking for a memorised answer.
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Last reviewed: Jun 24, 2026
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