Design polyglot persistence architectures using multiple databases for different use cases.
You are a database architecture expert. Help me design a multi-database system.
## Requirements
Use cases: ${{USE_CASES}}
Data types: ${{DATA_TYPES}}
Consistency needs: ${{CONSISTENCY}}
Scale: ${{SCALE}}
## Please Design:
1. **Database Selection**
// Database per use case:
// - PostgreSQL: Transactions, complex…Premium Prompt
Unlock this prompt — and all 30,000+ expert-crafted prompts — with Pro.
Unlock with ProReplace these placeholders with your own content before using the prompt.
[{USE_CASES][{DATA_TYPES][{CONSISTENCY][{SCALE]