https://github.com/ravirch/postgresql-sql-guide

This repository is a comprehensive PostgreSQL SQL Guide, covering essential topics from foundational SQL queries to advanced concepts like joins, subqueries, and data manipulation commands.
https://github.com/ravirch/postgresql-sql-guide

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This repository is a comprehensive PostgreSQL SQL Guide, covering essential topics from foundational SQL queries to advanced concepts like joins, subqueries, and data manipulation commands.

• Host: GitHub
• URL: https://github.com/ravirch/postgresql-sql-guide
• Owner: ravirch
• Created: 2024-05-09T06:17:13.000Z (over 1 year ago)
• Default Branch: main
• Last Pushed: 2024-10-02T05:04:30.000Z (about 1 year ago)
• Last Synced: 2025-05-27T01:44:21.120Z (5 months ago)
• Topics: postgresql, psql, sql
• Homepage:
• Size: 874 KB
• Stars: 0
• Watchers: 1
• Forks: 0
• Open Issues: 0
• Metadata Files:
  • Readme: README.md

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README

          
# **PostgreSQL SQL Guide**

This repository serves as a structured guide to mastering SQL using PostgreSQL. It covers foundational SQL concepts, advanced query techniques, and practical exercises to help you become proficient in SQL through step-by-step learning.

## **Table of Contents**

1. **[Introduction to Databases and PostgreSQL](https://github.com/ravirch/PostgreSQL-SQL-Guide/blob/main/Notes/Introduction%20to%20Databases%20and%20PostgreSQL.md)**

   - What is a Database?

   - Understanding Relational Database Management Systems (RDBMS)

   - Overview of PostgreSQL and Its Features

   - Setting Up PostgreSQL for Practice

2. **[Foundation of SQL Queries](https://github.com/ravirch/PostgreSQL-SQL-Guide/blob/main/Notes/Foundation%20of%20SQL%20Queries.md)**

   - Introduction to SQL and its Applications

   - Retrieving Data with the SELECT Statement

   - Filtering Rows with WHERE Clause

   - Sorting Results with ORDER BY

   - Introduction to Data Types in SQL

   - Basic Operators in SQL

   - [Read more examples here](https://github.com/ravirch/PostgreSQL-SQL-Guide/blob/main/Examples/Examples%20Foundation%20of%20SQL%20Queries.md)

3. **[Advanced Filtering and Grouping](https://github.com/ravirch/PostgreSQL-SQL-Guide/blob/main/Notes/Advanced%20Filtering%20and%20Grouping.md)**

   - Utilizing the IN Operator

   - Understanding the NOT IN Operator

   - Introduction to LIKE Operator for Pattern Matching

   - Handling NULLs in SQL Queries

   - Grouping and Aggregating Data with GROUP BY

   - Filtering Groups with HAVING Clause

   - [Read more examples here](https://github.com/ravirch/PostgreSQL-SQL-Guide/blob/main/Examples/Examples%20Advanced%20Filtering%20and%20Grouping.md)

4. **[Mastering Joins and Subqueries](https://github.com/ravirch/PostgreSQL-SQL-Guide/blob/main/Notes/Mastering%20Joins%20and%20Subqueries.md)**

   - Understanding JOINs in SQL

   - Performing Inner Joins, Outer Joins, and Cross Joins

   - Self Joins for Advanced Data Analysis

   - Using UNION and UNION ALL for Merging Results

   - Working with Subqueries

   - [Read more examples here](https://github.com/ravirch/PostgreSQL-SQL-Guide/blob/main/Examples/Examples%20Mastering%20Joins%20and%20Subqueries.md)

5. **[Practical Application and Table Creation](https://github.com/ravirch/PostgreSQL-SQL-Guide/blob/main/Notes/Practical%20Application%20and%20Table%20Creation.md)**

   - Creating Tables and Specifying Constraints

   - Column-Level Constraints (`PRIMARY KEY`, `UNIQUE`, `NOT NULL`)

   - Table-Level Constraints (`FOREIGN KEY`, `CHECK`)

6. **[Data Modification Commands](https://github.com/ravirch/PostgreSQL-SQL-Guide/blob/main/Notes/Data%20Modification%20Commands.md)**

   - Inserting Data into Tables

   - Updating Existing Records

   - Deleting Records from Tables

   - [Read more examples here](https://github.com/ravirch/PostgreSQL-SQL-Guide/blob/main/Examples/Examples%20Data%20Modification%20Commands.md)

7. **Real-World Case Studies**

   - Case Study 1: [Sales Analysis with SQL](https://github.com/ravirch/PostgreSQL-SQL-Guide/blob/main/Case%20Studies/Sales%20Analysis%20with%20SQL.md)

   - Case Study 2: [Customer Segmentation with SQL](https://github.com/ravirch/PostgreSQL-SQL-Guide/blob/main/Case%20Studies/Customer%20Segmentation%20with%20SQL.md)

8. **Self Practice**

   - Case Study: Employee Management and Reporting: Read the solved case studies from section 7 and apply your analytical skills to create similar case study on Employee managemenet & reporting.