Examlex
A ____ occurs when you have one entity in two 1:M relationships to other entities,thus producing an association among the other entities that is not expressed in the model.
Q5: What is a rule that applies to
Q7: The hierarchical data model was developed in
Q16: Each column in a relation represents a(n)_.
Q22: The SQL command that lets you select
Q45: According to the Data-Modeling Checklist,_ should be
Q48: All relational tables satisfy the _ requirements.
Q57: A _ key is defined as a
Q63: The conflicts between design efficiency,information requirements,and processing
Q63: Explain the transaction log.What is its function?
Q87: A(n)_ join will select only the rows