I realized that you can add a scope for the whole database or just a number of tables.
The question would be, if you’re going to synchronize a full database, which would be preferrable, one scopename for the whole database, or would it be better to scope and synchronize per schema?
that would depend on some factors: number of tables, frequency of update, sync direction, etc…
have a look at this: SYNC FRAMEWORK SCOPE AND SQL AZURE DATA SYNC DATASET CONSIDERATIONS