Basic SQL Queries

Mastering fundamental SQL queries is an indispensable skill for anyone seeking to leverage the power of databases in data science. This chapter aims to equip you with the essential abilities to retrieve data efficiently. You will learn how to construct simple SQL statements that allow you to filter, sort, and present data from one or more tables based on your specific requirements.

Throughout this chapter, we will explore the critical components of SQL queries, including the SELECT statement, which forms the core of most data retrieval tasks, as well as WHERE clauses for filtering records and ORDER BY clauses for sorting results. You'll also delve into combining conditions using logical operators and understand the significance of DISTINCT in retrieving unique records.

By the end of this chapter, you will be proficient in writing basic queries that can extract meaningful insights from datasets, laying the foundation for more advanced SQL techniques in subsequent lessons. Prepare to transform raw data into valuable information through the power of SQL.