Using the
system tableAll conditions of the columns of table CUSTOMER that represent explicit value checks
Constraints (integrity conditions) that relate to NOT NULL definitions, primary keys, UNIQUE definitions or referential constrains are not found with this SELECT statement.
NOT-NULL columns: see
Primary keys: see COLUMNS
UNIQUE columns: see
INDEXESReferential constraint: see
FOREIGNKEYSColumns in a referential constraint: see
FOREIGNKEYCOLUMNSConstraint of a domain: see
DOMAINCONSTRAINTS