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Sample Database Schema If you want download more data please go this website. Link Day 1: Introduction to Databases Day 2: Basic SQL Syntax Day 3: Retrieving Data from Multiple Tables Day 4: Aggregate Functions Day 5: Subqueries Day 6: Data Manipulation Language (DML) Day 7: Data Definition Language (DDL) Read more…
Introduction to SQL and YouTube as a Learning Platform Learning SQL (Structured Query Language) is essential for anyone interested in data management and manipulation. As the backbone of database interaction, SQL is crucial for various applications in data analysis, software development, and business intelligence. YouTube offers a unique and accessible Read more…
Data engineering is a rapidly evolving field crucial for managing and optimizing data pipelines in modern businesses. As the demand for skilled data engineers grows, so does the need for reliable educational resources. YouTube has become a valuable platform for learning, with numerous experts sharing their knowledge and insights. Here Read more…
Learn how to perform ETL (Extract, Transform, Load) processes using PySpark. This comprehensive guide covers everything from environment setup and data extraction to advanced data transformations, handling missing values, data type conversion, and performance tuning. You’ll also explore advanced topics like stream processing, machine learning integration, and working with large Read more…
Delta Lake and Data Lake are both types of data storage systems, but they differ in their key features and use cases. Delta Lake is a distributed data lake built on top of Apache Hadoop that provides transactional data processing capabilities, compact storage, and efficient data retrieval. Understanding Data Lakes Read more…
As Apache Spark continues to be a widely adopted big data processing framework, it’s essential for aspiring and experienced data professionals to be well-versed in Spark concepts and be prepared to tackle Spark-related interview questions. This comprehensive article covers the top 50+ Apache Spark interview questions and answers that you’re Read more…
How to pass databricks certification data engineer associate exam with a high score is a big deal for anyone in the field of data engineering. In this article, I’ll share the approach I used to not only pass the exam but to score an impressive 95%. This journey involves structured Read more…
Are you looking for Best Free Online Data Analytics Courses? If yes, then this article is for you. In this article, you will find the 7 Best Free Online Data Analytics Courses from various platforms. These free data analytics courses will help you to learn data analytics free of cost. All courses Read more…
Introduction: Are you interested in pursuing a big data engineer career/ roadmap ?. This article presents a comprehensive road map to help you kick-start your journey as a data engineer. Whether you are completely new to the field or looking to switch careers, this guide will provide you with step-by-step Read more…
Data Structures Runtime Table: Ordered as (Average Runtime / Worst Runtime) Data Structure Access Search/Contains Insertion Deletion Array (Resizing) Θ(1) Θ(n) Θ(n) Θ(n) Stack/Queue Θ(n) Θ(n) Θ(1) Θ(1) Linked-List Best version SLL and DLL Θ(n) Θ(n) Θ(1)Insert at front for SLL Θ(1) Hash Table Constant amortized time No indexing Θ(1) / Θ(n)Good/Bad Distribution Θ(1) / Θ(n) Read more…