Explanation:Here more than one entity in one set is related to one one entity in other set. 4. Data integrity constraints are used to:
A. Control who is allowed access to the data
B. Ensure that duplicate records are not entered into the table
C. Improve the quality of data entered for a specific property
D. Prevent users from changing the values stored in the table
Answer:A
Explanation:Here more than one entity in one set is related to one one entity in other set. 4. Data integrity constraints are used to:
A. Control who is allowed access to the data B. Ensure that duplicate records are not entered into the table C. Improve the quality of data entered for a specific property D. Prevent users from changing the values stored in the table
Explanation:The data entered will be in a particular cell (i.e., table column) . 5. Establishing limits on allowable property values, and specifying a set of acceptable, predefined options that can be assigned to a property are examples of: