Basic SQL Queries

Mastering fundamental SQL queries is an essential skill for anyone looking to use databases in data science. This chapter aims to equip you with the core 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 look into the important 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 investigate combining conditions using logical operators and understand the importance of DISTINCT in retrieving unique records.

By the end of this chapter, you will be skilled in writing basic queries that can extract meaningful insights from datasets, setting the stage for more advanced SQL techniques in subsequent lessons. Get ready to transform raw data into valuable information through SQL.