Hi @Salah KHALFALLAH​ , looking at the documentation it appears that Databricks' preferred naming convention is lowercase and underscores as you mentioned.

The reason for this is most likely because Databricks uses Hive Metastore, which is case insensitive, so querying "MyTable" is the same as "mytable" and "MYTABLE" and will be displayed as "mytable" in the data browser window, so camel case may not be that helpful when naming objects.