Jack Wallen explains how to add data into a MySQL table from the command line.

If your business uses relational databases to store data, it helps to use the SQL SELECT command with the INTO clause to create new tables from query results. This method isn't ANSI-standard SQL ...

To others, however, the command line is too cumbersome to be efficient. Fortunately, for those users, there are plenty of GUIs available to make the task easier.