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Data Warehousing

Data warehousing ek process hai jisme multiple sources (databases, files, APIs, applications) se…

Overview

Data Warehousing — Quick Facts

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Property: Detail

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Full Name: Data Warehousing

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Category: Database, Data Platform, Analytics…

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Type: Glossary Term / Architecture…

Topic 1

Infobox

📊 | Property | Detail |…

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Kya Hai Data Warehousing?

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Sales system (orders, revenue) —…

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HR system (employees, salaries) —…

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Finance system (expenses, budgets)…

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Marketing system (campaigns,…

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Kyun Zaroori Hai?

🗄️ 1. Single Source of Truth — Sab data ek jagah. No more "Sales team ka number alag hai,…

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Key Characteristics

📈 Bill Inmon ne data warehouse ki 4 key characteristics define ki thi (— Not confirmed for…

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Data Warehouse Architecture — Mermaid Diagram

🔍 `mermaid flowchart LR S1["🗄️ Source 1\nSales DB"] --> ETL["🔄 ETL Process\n(Extract →…

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ETL Process

📉 ETL = Extract, Transform, Load — data warehouse me data laane ka standard process: |…

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Data Warehouse vs Database (OLTP vs OLAP)

🧮 | Aspect | Database (OLTP) | Data Warehouse (OLAP) |…

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Data Warehouse vs Data Lake

🌐 | Aspect | Data Warehouse | Data Lake |…

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Schema Designs

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Center: Fact table (measures —…

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Points: Dimension tables (who,…

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Simple, fast queries, easy to…

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Most common in data warehouses

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Challenges

🗄️ | Challenge | Problem | Mitigation |…

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Best Practices

📈 1. Design for Business Questions — Pehle socho "kya analyze karna hai?" phir schema…

Comparison

Data Warehouse vs Database (OLTP vs OLAP)

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Purpose: Day-to-day transactions

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Operations: INSERT, UPDATE, DELETE…

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Data Scope: Current/recent data

Comparison

Data Warehouse vs Data Lake

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Data Type: Structured (tables, schemas)

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Schema: Schema-on-write (define before…

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Processing: ETL (clean before load)

Diagram

Visual Flow

📊 Diagram visualization — details in narration

Quiz — Question 1

Data Warehousing ka sabse sahi definition kya hai?

Quick Quiz

Quiz — Question 2

Data Warehousing ka 'Full Name' kya hai?

Complete! 🎉

Data Warehousing Complete!

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