Type and statu of oracle constraint

1. Type of constraint
C (check constraint on a table)
P (primary key)
U (unique key)
R (referential integrity)
V (with check option, on a view)
O (with read only, on a view)
2.Statu of constraint
1) Enable Validate:
a) check current data. If invalidate, the constraint cannot be created or enabled. b) the constraint is enabled c) check new inserted or updated data. [...]