Which command would you use to combine rows from two or more tables based on a related column?

The command used to combine rows from two or more tables based on a related column is JOIN. This command allows for the establishment of a connection between two tables by their related fields, enabling you to retrieve related data from both tables in a single result set. JOIN is fundamental in relational databases, supporting various types of joins such as INNER JOIN, LEFT JOIN, RIGHT JOIN, and FULL OUTER JOIN, each serving different purposes depending on how you want to handle the relationships between the data.

For instance, an INNER JOIN will return only the rows with matching values in both tables, while a LEFT JOIN returns all rows from the left table and the matched rows from the right table, inserting NULLs for non-matching rows. Understanding how to use JOIN effectively is crucial for database operations and data analysis, as it allows for versatile queries and deeper insights into related datasets.