Which characteristic is an advantage of a database management system?
Consider the following relation definitions:STUDENT(Student_Number: integer NOT NULLName: variable length character string length 20 )Primary Key Student_NumberHOUSING(Housing_ID: integer NOT NULLStudent_Number: integer NOT NULLBuilding: variable length character string length 25 ) Primary Key […]
Which of the following best describes the information contained in the data dictionary (or system catalog)?
Which relational algebraic operation is used to select specific columns (attributes) from a relation?
Which of the following describes two desirable characteristics of a primary key?
Which term best defines a database system in which data records are stored in one or more files with no structured relationship?
Which of the following best describes the two-tier database architecture?
Which term describes an attribute or combination of attributes that uniquely identifies a row in a relation?
Which of the following is a characteristic of the three-tier database architecture?