DB connection

Are you referring to connecting directly to the database via code in Creatio? If so see here: https://customerfx.com/article/executing-direct-sql-statements-in-a-process-or-configuration-web-service-in-creatio-formerly-bpmonline/

If you're referring to using a tool to connect and view the database directly, not really possible. However, you can execute SQL statements remotely using Clio/Clio Explorer: See here https://customerfx.com/article/how-to-install-clio-explorer-for-creatio/

Ryan