Data Science Hub
  • Data Science Hub
  • STATISTICS
    • Introduction
    • Fundamentals
      • Data Types
      • Central Tendency, Asymmetry, and Variability
      • Sampling
    • Distributions
      • Exponential Distribution
    • A/B Testing
  • Database
    • Database Fundamentals
    • Database Management Systems
    • Data Warehouse vs Data Lake
  • SQL
    • SQL Basics
      • Creating and Modifying Tables/Views
      • Data Types
      • Joins
    • SQL Rules
    • SQL Aggregate Functions
    • SQL Window Functions
    • SQL Data Manipulation
      • String Operations
      • Date/Time Operations
    • SQL Descriptive Stats
    • SQL Tips
    • SQL Performance Tuning
    • SQL Customization
    • SQL Practice
      • Designing Databases
        • Spotify Database Design
      • Most Commonly Asked
      • Mixed Queries
      • Popular Websites For SQL Practice
        • SQLZoo
          • World - BBC Tables
            • SUM and COUNT Tutorial
            • SELECT within SELECT Tutorial
            • SELECT from WORLD Tutorial
            • Select Quiz
            • BBC QUIZ
            • Nested SELECT Quiz
            • SUM and COUNT Quiz
          • Nobel Table
            • SELECT from Nobel Tutorial
            • Nobel Quiz
          • Soccer / Football Tables
            • JOIN Tutorial
            • JOIN Quiz
          • Movie / Actor / Casting Tables
            • More JOIN Operations Tutorial
            • JOIN Quiz 2
          • Teacher - Dept Tables
            • Using Null Quiz
          • Edinburgh Buses Table
            • Self join Quiz
        • HackerRank
          • SQL (Basic)
            • Select All
            • Select By ID
            • Japanese Cities' Attributes
            • Revising the Select Query I
            • Revising the Select Query II
            • Revising Aggregations - The Count Function
            • Revising Aggregations - The Sum Function
            • Revising Aggregations - Averages
            • Average Population
            • Japan Population
            • Population Density Difference
            • Population Census
            • African Cities
            • Average Population of Each Continent
            • Weather Observation Station 1
            • Weather Observation Station 2
            • Weather Observation Station 3
            • Weather Observation Station 4
            • Weather Observation Station 6
            • Weather Observation Station 7
            • Weather Observation Station 8
            • Weather Observation Station 9
            • Weather Observation Station 10
            • Weather Observation Station 11
            • Weather Observation Station 12
            • Weather Observation Station 13
            • Weather Observation Station 14
            • Weather Observation Station 15
            • Weather Observation Station 16
            • Weather Observation Station 17
            • Weather Observation Station 18
            • Weather Observation Station 19
            • Higher Than 75 Marks
            • Employee Names
            • Employee Salaries
            • The Blunder
            • Top Earners
            • Type of Triangle
            • The PADS
          • SQL (Intermediate)
            • Weather Observation Station 5
            • Weather Observation Station 20
            • New Companies
            • The Report
            • Top Competitors
            • Ollivander's Inventory
            • Challenges
            • Contest Leaderboard
            • SQL Project Planning
            • Placements
            • Symmetric Pairs
            • Binary Tree Nodes
            • Interviews
            • Occupations
          • SQL (Advanced)
            • Draw The Triangle 1
            • Draw The Triangle 2
            • Print Prime Numbers
            • 15 Days of Learning SQL
          • TABLES
            • City - Country
            • Station
            • Hackers - Submissions
            • Students
            • Employee - Employees
            • Occupations
            • Triangles
        • StrataScratch
          • Netflix
            • Oscar Nominees Table
            • Nominee Filmography Table
            • Nominee Information Table
          • Audible
            • Easy - Audible
          • Spotify
            • Worldwide Daily Song Ranking Table
            • Billboard Top 100 Year End Table
            • Daily Rankings 2017 US
          • Google
            • Easy - Google
            • Medium - Google
            • Hard - Google
        • LeetCode
          • Easy
  • Python
    • Basics
      • Variables and DataTypes
        • Lists
        • Dictionaries
      • Control Flow
      • Functions
    • Object Oriented Programming
      • Restaurant Modeler
    • Projects
      • Web Scraping and Mapping
      • Agoda Reviews - Part I - Scraping Reviews, Detecting Languages, Preprocessing
      • Agoda Reviews - Part II - Review Analysis and WordClouds
    • Pythonic Resources
  • Machine Learning
    • Fundamentals
      • Supervised Learning
        • Classification Algorithms
          • k-Nearest Neighbors
            • kNN Parameters & Attributes
          • Logistic Regression
        • Classification Report
      • UnSupervised Learning
      • Preprocessing
        • Scalers: Standard vs MinMax
        • Feature Selection vs Dimensionality Reduction
    • Frameworks
    • Machine Learning in Advertising
    • Natural Language Processing
      • Stopwords
      • Name Entity Recognition (NER)
    • Recommendation Systems
      • Spotify Recommender System - Artists
  • Geospatial Analysis
    • Geospatial Analysis Basics
    • GSA at Work
  • GIT
    • GIT Essentials
    • Connecting to GitHub
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Data Science Hub

Welcome to Data Science Hub, your ultimate destination for all things related to data science!

Last updated 4 months ago

My name is Sedar Sahin, and I have over a decade of professional experience in data science, machine learning and analytics. From energy to tech and to e-commerce, I've witnessed the profound impact of data science across industries and its development over the years. This blog is designed to serve all data enthusiasts as an invaluable resource, covering essential topics like statistics, databases, SQL, machine learning, geospatial analysis, business applications and more.

Whether you're a seasoned expert refining your skills or a passionate learner taking your first steps, here you'll discover educational articles, tutorials, step-by-step guides, case studies, and practical insights to empower your data journey. DH Hub will serve your guide to mastering Statistics, Database Systems, SQL, Python, Machine Learning, and More! ut also as a bookmark so for you to check

Let's connect on LinkedIn! And if you have any questions/comments or need consultancy please reach out!

I will be expanding topics and sharing industry trends, so stay tuned!

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