Exercise Consider the following relational database: (STDNO, SNAME, DEPTNO#) (DEPTNO, DNAME) (CORSNO, CNAME, DEPTNO#, CMAX) ENROLMENT (STDNO#, CORSNO#, GRADE, EDATE) STUDENT DEP COURSE STUDENT.DEPTNO is the department number of the student. COURSE.DEPTNO is the department number that offers the course. ENROLMENT models the registrations of students in courses (M:M relationship) where the GRADE is the grade obtained by the student in the course. PART I: DATA DESCRIPTION LANGUAGE (DDL) 1) Write DDL commands to create the four tables without any constraint. Nom de colonne Signification Size Турe Number STDNO Student Number 8. SNAME Student name Varchar2 30 Department Number Department name Course Number DEPTNO Varchar2 DNAME Varchar2 20 CORSNO Number 3 CNAME Course Name Varchar2 30 СМАХ Max. students allowed Number 2 GRADE Obtained Grade Number EDATE Enrolment date Date

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