A relational algebra operator produces the following result on the table Department: $$\begin{array} { | l | l | l | l | }
\hline \text { Deptno } & \text { Deptname } & \text { Deptcity } & \text { Deptmgr } \
\hline 100 & \text { Logistics } & \text { Wichita } & 666 \
\hline 300 & \text { Marketing } & \text { Pierre } & 666 \
\hline
\end{array}$$ That operator is:
A) The restrict operator
B) The project operator
C) The extended cross product operator
D) A join operator

Question

A relational algebra operator produces the following result on the table Department: $$\begin{array} { | l | l | l | l | } 
\hline \text { Deptno } & \text { Deptname } & \text { Deptcity } & \text { Deptmgr } \
\hline 100 & \text { Logistics } & \text { Wichita } & 666 \
\hline 300 & \text { Marketing } & \text { Pierre } & 666 \
\hline
\end{array}$$ That operator is:
A) The restrict operator
B) The project operator
C) The extended cross product operator
D) A join operator

Quizplus · Accepted Answer

The restrict operator (also known as the selection operator) filters rows based on a specified condition. The result shows only rows where the Deptmgr is 666, indicating a restriction was applied.

A Relational Algebra Operator Produces the Following Result on the Table