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

question 58

Short Answer

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.

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Definitions:

No-show

A no-show is a term used when an individual fails to appear for an appointment or reservation without prior notice.

Missed Appointment

A scheduled meeting or consultation that was not attended by the individual or party without prior notification.

Appointment Book

An Appointment Book is a document or software used to record and organize appointments, typically utilized in professional settings like medical offices.

Fasting

A practice of abstaining from all or some kinds of food or drink for a specific period of time, often used for health, religious, or ethical purposes.