patton14 wrote: I want to know is whether the CB data can be stored in a database and to manipulate or are stored only in CB and can not be touched.
need to link user data from Joomla to Moodle, it means that also automatically enter Joomla you log into Moodle.
CB API document (gave you link on other post you made) has information about the CB Database.
Please study and if you have something specific ask it.
CB user profile data is stored in comprofiler table.
Of course if you change the contents changes will be picked up.
But database schema might change so API usages is recommended to grab data from database or to put data in database.