SQL revision notes and practice covering PostgreSQL fundamentals, advanced SQL, database design, and practical projects.

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• Updated Sep 3, 2026
• PLpgSQL

🌐 Dive into DBMS BASICS! A complete guide to mastering Database Management Systems 📚💻. Perfect for students & professionals to grasp core concepts, practices, & implementation 🚀. Unlock the power of data management today! 🔑✨

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• Updated Oct 11, 2025

Solutions to HackerRank practice problems.

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• Updated Feb 26, 2024
• Python

Commonly Used SQL Functions

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• Updated May 6, 2024

Portfolio meiner Data-Analytics-Projekte mit Fokus auf Datenbereinigung, EDA und Visualisierung

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• Updated Dec 19, 2025
• Jupyter Notebook

SQL exercises and projects done at alx training

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• Updated Jun 3, 2024
• Jupyter Notebook

This Specialization is intended for a learner with no previous coding experience seeking to develop SQL query fluency. Through four progressively more difficult SQL projects with data science applications, you will cover topics such as SQL basics, data wrangling, SQL analysis, AB testing, distributed computing using Apache Spark, and more. These…

data-science sql apache-spark sqlite ab-testing data-wrangling sql-analysis sql-basics

• Updated Apr 7, 2021

Coleção de scripts SQL para estudos e prática de comandos básicos e intermediários, incluindo SELECT, WHERE, ORDER BY, aliases e consultas exploratórias.

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• Updated Aug 8, 2025

This repository contains structured SQL notes, practice queries, and interview questions. Covers DDL, DML, Joins, Subqueries, Constraints, Views, and more. Ideal for beginners, students, and developers to learn, practice, and revise SQL with real-world examples and sample database schemas.

mysql postgres sql database sqlite dbms oracle normalization sql-functions datatypes sql-notes sql-interview-questions sql-basics sql-joins sql-guide

• Updated Aug 7, 2025