The excel file contains the data. It’s equivalent to the database.
The excel program is how you interact with the data. SQL is how you interact with databases.
Doesn’t matter how the data is structured inside the database. You can ask in the SQL language and you will receive an SQL answer.
I’ll take it over 0, because it will force people to think with what arrays are populated. And if 1 index or 0index is appropriate instead of defaulting all arrays and loops at 0.