**OLTP** (SAP, PostgreSQL): Optimized for high-volume, low-latency transactional writes; ACID; point lookups; indexes on primary/foreign keys. **OLAP** (Snowflake, Redshift): Optimized for bulk reads, aggregations, scans; columnar storage; few indexes. **Why separate**: OLTP can't scale for analytics without degrading transaction latency; OLAP schemas (Star) are write-inefficient. **Adidas relevance**: OLTP powers e-commerce checkout, POS, inventory—sub-100ms response....
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