Sorting - 4 Keys

Any combined sort can be done by sequential one column sorts.

For example, a triple sort of by Name, then on State and then on City, can be done by

Sort on City
then Sort on State
then Sort on Name

Doing 4 (or more) one column sorts is equivalent to doing a single quadruple (or more) sort.

If Mike's suggestion seems a little counterintuitive, it is because Excel performs stable sorts: the relative order of records having the same key is unchanged.