DBS-C01 Deployment and Migration Practice Question
A financial services company is migrating a 2 TB Oracle database to Amazon Aurora PostgreSQL. The database uses Oracle-specific features like hierarchical queries and stored procedures. The company wants to minimize manual code changes. Which service should be used to automate schema conversion?
⚠ Common exam trap
Many exam-takers confuse AWS DMS (data migration) with schema conversion, assuming DMS can handle both data and schema transformation, but DMS only migrates data and requires a pre-converted target schema, which SCT provides.
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
✓
AWS Schema Conversion Tool (SCT).
AWS Schema Conversion Tool (SCT) is specifically designed to convert database schemas from one engine to another, including Oracle to Amazon Aurora PostgreSQL. It automates the conversion of Oracle-specific features like hierarchical queries (CONNECT BY) and stored procedures into PostgreSQL-compatible syntax (e.g., recursive CTEs and PL/pgSQL), minimizing manual code changes. This makes SCT the correct choice for schema conversion, while AWS DMS handles data migration separately.
Answer analysis
Option-by-option breakdown
For each option: why learners choose it and why it is or isn't the right answer here.
- ✗
AWS Database Migration Service (DMS) with full load and ongoing replication.
Why it's wrong here
DMS migrates data but does not convert schema objects like stored procedures or hierarchical queries.
- ✓
AWS Schema Conversion Tool (SCT).
Why this is correct
SCT automates the conversion of Oracle schema objects to PostgreSQL-compatible format.
- ✗
AWS Storage Gateway to cache data on-premises and then sync to S3.
Why it's wrong here
Storage Gateway is for hybrid storage, not schema conversion.
- ✗
AWS Lambda to execute custom scripts for schema transformation.
Why it's wrong here
Lambda can run custom scripts but requires manual effort; SCT is purpose-built for automated schema conversion.
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