Results for "data mining"
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Slowly Changing Dimensions (SCD)
Data Warehouse me ek bahut important concept hota hai: 👉 Slowly Changing Dimensions (SCD) Jab hum dimensional modeling karte hain, hum assume karte hain k…
What are Data warehouse, Data Lake ,data mining and DataMart and MetaData
Why a Data Warehouse? (Data Warehouse ki zarurat kyu hoti hai?) Aaj ke time me companies ka data multiple sources me store hota hai, jaise: • SQL Server da…
⭐ Star Schema vs ❄ Snowflake Schema – Data Warehouse Modeling
⭐ Star Schema Kya Hota Hai? Star Schema ek simple aur sabse popular data warehouse model hai. Isme: Beech me hoti hai 👉 Fact Table Uske around hoti hain �…
OLTP vs OLAP: A Beginner's Guide
What is OLTP? OLTP stands for Online Transaction Processing . It is a type of database system designed to handle a large number of short, quick operations,…
What is the KDD (Knowledge Discovery in Databases)
In today's world, data is everywhere. Businesses, healthcare, banking, and even social media generate vast amounts of data every second. But raw data alone…
Data Warehouse and Data Mining Syllabus
Yeh Data Warehouse and Data Mining ka complete syllabus list format me diya hai, bina explanation ke — sirf topics list: PART 1: Data Warehouse Syllabus Li…
In-Memory Databases (Data Warehouse Context)
🔹 In-Memory Database kya hoti hai? In-memory database wo database hoti hai jisme: 👉 Data hard disk par store nahi hota 👉 Data directly RAM (memory) me s…
What Are OLAP Cubes
When we work with a Data Warehouse, one common goal is fast reporting and analysis . Business users don’t want to wait 30 seconds for a dashboard to load. …
What is Operational Data Storage (ODS)?
Data Warehouse padhte time ek topic aata hai jo thoda confusing hota hai: 👉 ODS (Operational Data Storage) Bahut log confuse ho jate hain: “Ye Data Wareho…
What Is Dimensional Modeling in Data Warehouse?
Before going deep into Star Schema and Fact Tables, pehle ek basic sawal: Dimensional Modeling hota kya hai? Dimensional Modeling ek technique hai jo Data …
Natural Key vs Surrogate Key in Data Warehouse
Dimensional Modeling me ek important topic hota hai: 👉 Natural Key 👉 Surrogate Key Dono primary key ke type hain, lekin inka purpose aur usage alag hota …
Indexes in Data Warehouse
Database Me Data Kaise Store Hota Hai? Table ke rows disk par randomly store hote hain. Example: Row Customer_ID Sales 1 8 100 2 5 200 3 4 300 4 8 150 Agar…
Row-Based vs Column-Based (Columnar) Storage
Database me table hume: Rows aur columns ke form me dikhti hai. Lekin internally data store hone ka tareeka alag hota hai. Do main storage types hote hain:…
What is MPP (Massively Parallel Processing)
Aaj ke time me: ✔ Data bahut fast grow ho raha hai ✔ Users bahut zyada queries run kar rahe hain ✔ Reports real-time chahiye Traditional database model is …