Binary Number Transformation

This method is my idea to cover the weakness of Dummy Variable transformation.

The name "Binary Number Transformation" is given by me because I do not know general name.

Procedure

Transform names into binary number.
Tokyo is " 00 ". LA is " 01 ". Paris is " 10 ". London is " 11 ".
Put each place of binary data into each columns.
2 tables is equal to start table.

In this method, columns are not so many.

Using 2 tables is not easy to understand the final conclusion.