In the context of SQL, what does the 'JOIN' command do?

The 'JOIN' command in SQL is designed to combine rows from two or more tables based on a related column between them. This functionality allows for the collation of data from multiple tables, enabling users to retrieve information that is distributed across these tables in a structured manner.

For instance, when working with a relational database, you may have one table containing customer information and another table containing order details. By using a JOIN, you can merge these two tables on a common field, such as a 'CustomerID', to generate a comprehensive view that includes both customer and order data in a single query result. This capability is essential for performing complex queries and obtaining meaningful insights from related datasets.