In a database table, what does a column represent?

Appeared in: Raj. CHO -2025

Explanation

In database terminology, a column represents a specific attribute or characteristic of the data being stored.
Each column is designed to hold a specific type of data (e.g., text, numbers, dates) for every record in the table.
For instance, in a patient information table, 'Last Name', 'Date of Birth', and 'Blood Type' would each be individual columns.

Option B: This option defines a database or a schema, not a column. A database is a container that holds multiple related tables.
Option C: This option defines a row, also known as a record. A row represents a single, complete entry within a table, containing data across all its columns.

Visual 1: Diagram - A simple database table (e.g., 'Patients') with columns ('ID', 'Name', 'Age') and rows (data for Patient 1, Patient 2) clearly labeled to illustrate the difference.

Clinical Relevance

Nursing practice connection: This is primarily an exam-oriented knowledge point with limited direct bedside application, so retain Database Terminology: Columns, Rows, and Tables as background academic context rather than a clinical decision trigger.
Understanding database structure is fundamental in healthcare informatics. Electronic Health Records (EHRs) are complex databases where patient data is organized into tables, columns, and rows.
A nurse might query the EHR database to find all patients in a specific unit (a table) who have a certain allergy (a value in the 'Allergies' column).
What if a nurse needs to find all patients with a fasting blood sugar greater than 126 mg/dL? They would query the 'Lab_Results' table, filtering the 'Test_Name' column for 'Fasting Blood Sugar' and the 'Result' column for values greater than 126.

How to Approach the Question

First, identify the key terms in the question: 'database table' and 'column'.
Recall the basic structure of a table. A table is like a grid with vertical columns and horizontal rows.
Define each component: A 'table' holds all the data. A 'row' is one complete record or entry. A 'column' is a specific piece of information or attribute for each record.
Evaluate the options based on these definitions. Option A correctly defines a column as an 'attribute'.
Eliminate the other options by identifying what they describe: Option B describes a 'database', and Option C describes a 'row'.

Concept Tested & Keywords

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Practise the full Raj. CHO -2025

Attempt every question from this paper in a timed mock, then review the full solution for each one.