"ORA-00907: missing right parenthesis" in foreign key declaration - sql

Question

I am a university student who are new to Oracle Live SQL. My professor give us one page of code and let us debugging.
Only 1 error in the last paragraph(Enrollment TABLE) left. All tables except Enrollment table have been successfully created. I spent 6 hours on last paragraph but still can not find the wrong place. I have checked all the information on the web and did not find solution.
Please help, thanks!
CREATE TABLE Faculty (
FacNo CHAR(11) NOT NULL,
FacFirstName VARCHAR(30) NOT NULL,
FacLastName VARCHAR(30) NOT NULL,
FacCity VARCHAR(30) NOT NULL,
FacState CHAR(2) NOT NULL,
FacDept CHAR(6) NULL,
FacRank CHAR(4) NULL,
FacSalary DECIMAL(10,2) NULL,
FacSupervisor CHAR(11) NULL,
FacHireDate DATE NULL,
FacZipCode CHAR(10) NOT NULL,
CONSTRAINT FacultyPK PRIMARY KEY (FacNo),
CONSTRAINT SupervisorFK FOREIGN KEY (FacSupervisor) REFERENCES Faculty);
CREATE TABLE Course (
CourseNo CHAR(6) NOT NULL,
CrsDesc VARCHAR(50) NOT NULL,
CrsUnits INTEGER NULL,
CONSTRAINT CoursePK PRIMARY KEY (CourseNo) );
CREATE TABLE Offering (
OfferNo INTEGER NOT NULL,
CourseNo CHAR(6) NOT NULL,
OffTerm CHAR(6) NOT NULL,
OffYear INTEGER NOT NULL,
OffLocation VARCHAR(30) NULL,
OffTime VARCHAR(10) NULL,
FacNo CHAR(11) NULL,
OffDays CHAR(4) NULL,
CONSTRAINT OfferingPK PRIMARY KEY (OfferNo),
CONSTRAINT CourseFK FOREIGN KEY (CourseNo) REFERENCES Course,
CONSTRAINT FacultyFK FOREIGN KEY (FacNo) REFERENCES Faculty);
CREATE TABLE Student (
StdNo CHAR(11) NOT NULL,
StdFirstName VARCHAR(30) NOT NULL,
StdLastName VARCHAR(30) NOT NULL,
StdCity VARCHAR(30) NOT NULL,
StdState CHAR(2) NOT NULL,
StdZip CHAR(10) NOT NULL,
StdMajor CHAR(6) NULL,
StdClass CHAR(2) NULL,
StdGPA DECIMAL(3,2) NULL,
CONSTRAINT StudentPk PRIMARY KEY (StdNo) )
CREATE TABLE Enrollment(
OfferNo INTEGER NOT NULL,
StdNo CHAR(11) NOT NULL,
EnrGrade DECIMAL(3,2) NULL,
CONSTRAINT EnrollmentPK PRIMARY KEY (OfferNo,StdNo),
CONSTRAINT OfferingFK FOREIGN KEY (OfferNo) REFERENCES Offering
ON DELETE CASCADE
ON UPDATE CASCADE,
CONSTRAINT StudentFK FOREIGN KEY (StdNo) REFERENCES Student
ON DELETE CASCADE
ON UPDATE CASCADE);

Answer 1

First of all, there is missing semicolon at the end of the CREATE TABLE Student statement.
But I believe that what your teacher wants to emphasize is that ON UPDATE is not supported by Oracle foreign keys. As far as concerns, Oracle's point of view is that primary keys are meant to be immutable.
If you comment this part of the statement, the code runs fine :
CREATE TABLE Enrollment(
OfferNo INTEGER NOT NULL,
StdNo CHAR(11) NOT NULL,
EnrGrade DECIMAL(3,2) NULL,
CONSTRAINT EnrollmentPK PRIMARY KEY (OfferNo,StdNo),
CONSTRAINT OfferingFK FOREIGN KEY (OfferNo) REFERENCES Offering
ON DELETE CASCADE,
-- ON UPDATE CASCADE,
CONSTRAINT StudentFK FOREIGN KEY (StdNo) REFERENCES Student
ON DELETE CASCADE
-- ON UPDATE CASCADE
);
Demo on DB Fiddle.