A relational algebra operator produces the following result on the table Department: $$\begin{array} { | l | l | l | }
\hline \text { Deptno } & \text { Deptname } & \text { Deptcity } \
\hline 100 & \text { Logistics } & \text { Wichita } \
\hline 200 & \text { Finance } & \text { Boise } \
\hline 300 & \text { Marketing } & \text { Pierre } \
\hline
\end{array}$$ 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: $$\begin{array} { | l | l | l | } 
\hline \text { Deptno } & \text { Deptname } & \text { Deptcity } \
\hline 100 & \text { Logistics } & \text { Wichita } \
\hline 200 & \text { Finance } & \text { Boise } \
\hline 300 & \text { Marketing } & \text { Pierre } \
\hline
\end{array}$$ 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 project operator in relational algebra is used to select certain columns from a table, which matches the operation described as it results in a table with specific columns from the original table. The other options (restrict, extended cross product, and join) involve filtering rows, combining tables, and combining rows based on a condition, respectively, which do not match the described operation.

A Relational Algebra Operator Produces the Following Result on the Table