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Databases

Definition:Data Warehouse

A Data Warehouse is a relational database system optimized for analytical processing (OLAP) and business intelligence reporting.

Detailed Technical Explanation

Organizes historical data from multiple operational systems into columnar tables (Snowflake, BigQuery) for fast aggregation queries.

Business Perspective

Provides executive leadership with cross-department financial reporting and operational analytics.

Technical Perspective

Uses columnar storage and MPP (Massively Parallel Processing) execution to aggregate billions of rows in seconds.

Real-World Example

Consolidating Vidhayalam ERP fee records and HMS Core hospital billing data into BigQuery for corporate revenue analytics.

Common Architectural Mistakes

  • Using OLTP Databases for Analytics: Running heavy aggregation queries directly on live operational transaction databases.

Ecosystem Integration

Engineering Services & Solutions

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Frequently Asked Questions

OLTP vs OLAP?

OLTP handles sub-second single transaction writes; OLAP handles massive analytical aggregations over historical data.

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