Hi Carlos,
In Service now there are mainly two tables are there.
1) Task(task) table.
2) Configuration Item(cmdb_ci) Table.
These two tables are called as parent tables.
Many other tables are extended from these tables which are called child tables.
Task's child tables.
all these tables are extended or inherited from task table, all these we can cosider as task's tables.
change request
change task
Incident
Problem
Request
Requested Item
Catalog Task
Group Approval
Configuration Item child table's.
All these tables are extended from cmdb_ci table.
Database
Data Center
many more..
For tables and there parents please refer this Tables
If you want more you can refer schema map .
Thanks,
Nithin.
