SQL Crash Course: 45 SQL Queries to Make You a PRO

SQL Queries Used by Data Science Professionals

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SQL (Structured Query Language) is one of the most used programming languages, enabling users to interact with databases to retrieve, manipulate, and analyze data efficiently. ⁤⁤Whether you’re a seasoned data professional or just starting your journey in data analytics, mastering SQL is a critical skill. ⁤

⁤To lay the foundation for mastering SQL, you can go through this blog, where we’ll go through the top 46 fundamental SQL queries that every data professional should be aware of. ⁤⁤Starting from basic data retrieval to some advanced techniques for optimization, these queries will lay a solid foundation for your SQL journey. ⁤

⁤So, without further delay, let’s dive in and explore the power of SQL together! ⁤

We will start by creating a dataset for a retail store containing information about sales transactions.

Consider a dataset with the following schema:

• sales table:
• transaction_id (integer, primary key): Unique identifier for each transaction.
• transaction_date (date): Date of the transaction.
• product_id (integer): Identifier for the product sold.