Consider the Information Engineering diagram shown in the exhibit. Building_ID, R_ID,
Room_Count and Room_Num are integer numbers, whereas Bldg_Name, Location and
Res_Name are all represented by variable-length strings with a maximum of 20 characters. Which
SQL statement best implements the RESIDENT relation shown in this diagram?

Which statement accurately describes a characteristic of attributes?
Consider the Recreation relation in the exhibit. A data operation that changes one of the tuples
for Student_ID 1003 must be performed. It is necessary to change one of the activities from
swimming to tennis. The Student_ID and Activity attributes make up the primary key for the
Recreation relation. All related information must be altered, as well. Which SQL statement or
statements would best accomplish this?

In a relational database, which term describes a single table consisting of rows and columns?
Which relational algebraic operation is used to select specific columns (attributes) from a
relation?
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