CIW Related Exams
1D0-541 Exam
Consider the entity-relationship (ER) diagram shown in the exhibit. What do the characters at the ends of the connecting line indicate?

NULL) Primary Key Class_Num
Consider the Information Engineering diagram shown in the exhibit. Which DBDL definition best describes this diagram?

Which three pieces of information did E.F. Codd describe as necessary to retrieve a data value from a relational database?