A company makes four kinds of products. Each product has a size code, a weight code, and a shape code.
The following table shows these codes: $$\begin{array} { c c c c }
& \text { Size Code } & \text { Weight Code } & \text { Shape Code } \
\# 1 & 42 & 27 & 42 \
\# 2 & 27 & 38 & 13 \
\# 3 & 13 & 12 & 27 \
\# 4 & 42 & 38 & 38
\end{array}$$ Find which of the three codes is a primary key. If none of the three codes is a primary key, explain why.

Question

A company makes four kinds of products. Each product has a size code, a weight code, and a shape code.
The following table shows these codes: $$\begin{array} { c c c c } 
& \text { Size Code } & \text { Weight Code } & \text { Shape Code } \
\# 1 & 42 & 27 & 42 \
\# 2 & 27 & 38 & 13 \
\# 3 & 13 & 12 & 27 \
\# 4 & 42 & 38 & 38
\end{array}$$ Find which of the three codes is a primary key. If none of the three codes is a primary key, explain why.

Quizplus · Accepted Answer

The Answer of A company makes four kinds of products. Each product has a size code, a weight code, and a shape code.
The following table shows these codes: $$\begin{array} { c c c c } 
& \text { Size Code } & \text { Weight Code } & \text { Shape Code } \
\# 1 & 42 & 27 & 42 \
\# 2 & 27 & 38 & 13 \
\# 3 & 13 & 12 & 27 \
\# 4 & 42 & 38 & 38
\end{array}$$ Find which of the three codes is a primary key. If none of the three codes is a primary key, explain why.

A Company Makes Four Kinds of Products Find Which of the Three Codes Is a Primary Key