* Data Collection Challenges: Comprehensive, global data on school infrastructure isn't centrally collected. Information varies greatly by country and even within countries.
* Definition of "Cafeteria": The term itself is fluid. Some schools might have a simple lunchroom, while others have elaborate facilities. The definition impacts the count.
* Types of Schools: The question needs to specify whether it includes all levels (primary, secondary, higher education) and types of schools (public, private, religious, etc.).
While you can find statistics on school numbers in individual countries or regions, aggregating that into a global figure with certainty regarding cafeterias is impossible.