Important Base tables for HRMS

per_all_people_f	This table will provide us the very basic information about the employee. The very data from the first screen we see when we open the 'People -> Enter and Maintain' form goes into this table.
per_all_assignments_f	This table will store all the information which is been entered in the employee assignment form.
per_addresses	This table will store all the information which is been entered in the employee address form.
per_pay_proposals	This table will store all the information which is been entered in the employee salary form.
per_person_types_tl	This table is used to find the type of the employee. This table is linked with the per_all_people_f with the person_type_id to find out the type of person.
per_jobs_tl	This table will contain the various types of JOBS in oracle. This table has been linked with the per_all_assignments_f table to retrieve the correct job name from the employee.
per_grades_tl	This table will contain the various types of GRADES in oracle. This table has been linked with the per_all_assignments_f table to retrieve the correct grade name from the employee.
hr_locations_all	This table will contain the various LOCATIONS in oracle. This table has been linked with the per_all_assignments_f table to retrieve the correct location name from the employee.
pay_all_payrolls_f	This table will contain the various types of PAYROLLS in oracle. This table has been linked with the per_all_assignments_f table to retrieve the correct payroll name from the employee.
per_pay_bases	This table will contain the various types of PAY BASES in oracle. This table has been linked with the per_all_assignments_f table to retrieve the correct pay basis name from the employee.
per_assignment_status_types_tl	This table will contain the various types of assignment types in oracle. The assignment types generally would be 'Active Assignment' etc. This table has been linked with the per_all_assignments_f table to retrieve the correct job name from the employee.
per_person_type_usages_f	This table will store the correct person type of the particluar employee. We should never depend on the person type present in the per_all_people_f table. Instead, we need to link the person_id with this table and get the correct person type.