**Architectural Logic**: OLTP and OLAP solve orthogonal problems—transactional integrity vs analytical throughput—with different scaling and cost models. **OLTP**: Optimized for high-throughput, low-latency writes; ACID; normalized schemas; row-level locking. Powers core banking, trade execution. Scales vertically and via read replicas; write path is critical. **OLAP**: Denormalized star/snowflake; columnar storage; batch-oriented; powers risk aggregation, P&L, regulatory reporting....
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