08:57:47.877 DBMS SAMPLE -- Error: [IBM][CLI Driver][DB2/NT] SQL0104N An unexpected token "ENFORCED" was found following "K (grade <= 100) NOT". Expected tokens may include: "REFERENCES". SQLSTATE=42601
ENFORCED or NOT ENFORCED
Specifies whether the constraint is enforced by the database manager during normal operations such as insert, update, or delete. The default is ENFORCED.
The constraint is enforced by the database manager. 7 ENFORCED cannot be specified for a functional 7 dependency (SQLSTATE 42621). 7 ENFORCED cannot be specified when a referential 7 constraint refers to a nickname (SQLSTATE 428G7).
The constraint is not enforced by the database manager. This should only be specified if the table data is independently known to conform to the constraint.
What's that meaned to the "NOT ENFORCED"?
and the following contents of the CLASS_LIST table: