select distinct constraint_type from user_constraints;
C
-
C
P
R
U
Semble P signifie clé primaire et R signifie clé étrangère, correct? Que sont U et C?
Code Description Acts On Level
---------------------------------------------
C Check on a table Column
O Read Only on a view Object
P Primary Key Object
R Referential (Foreign Key) Column
U Unique Key Column
V Check Option on a view Object
De la documentation 12cR1 :
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
H - Hash expression
F - Constraint that involves a REF column
S - Supplemental logging