Advanced Sorting Result
When a table is sorted by the CountryLong column which uses the three-variable criterion from the previous slide:
First, the Country column is sorted.
Second, the Last Name column is sorted (the same surnames can appear multiple times within the same country).
Lastly, the First Name column is sorted (there can be multiple names associated with the same surname).
When you click on the Last Name column's header cell, the sorting will be simple – one variable criterion (due to the settings made on the previous slide).
