This episode provides an overview of Structured Query Language (SQL), focusing on its application in defining and manipulating relational database tables. It details how to create new tables, including defining primary keys and data types such as CHAR, VARCHAR, INTEGER, and CURRENCY. The resource further explains altering existing table structures by adding, deleting, or modifying columns, and demonstrates linking tables through foreign keys. Finally, it illustrates essential data manipulation commands, covering how to insert new records, update existing data, and delete records from a table using SQL statements.