Do underscores in a MySQL table names cause issues?

Question

Do underscores in table names affect performance or cause issues on some platforms?

For example, user_profiles

Would it be better to use user

Answer 1

Nope, underscores in a database never cause any issues at all. My experience say that it is a better idea to identify any words in a database column.

If we use 'thisIsMyColumn' as a column name it's easy to write them, but 'this_is_my_column' as column name is more readable than the previous one.