Reflecting on SQL Expressions: Using the IN Operator

How can we correctly use the IN operator to check if a patient's name is 'Dave', 'Nancy', or 'Sutapa'?

SELECT ONE OF THE FOLLOWING:
A. ('Dave', 'Nancy', 'Sutapa") IN Name
B. ('Dave' OR 'Nancy' OR 'Sutapa') IN Name
C. Name IN ('Dave', 'Nancy','Sutapa')
D. Name IN ('Dave' OR 'Nancy' OR 'Sutapa')

Answer

The correct expression is: C. Name IN ('Dave', 'Nancy', 'Sutapa')

Reflecting on SQL expressions involves understanding the correct usage of operators like the IN operator. In this scenario, we are tasked with checking if a patient's name matches specific names using the IN operator.

The correct expression to achieve this is: Name IN ('Dave', 'Nancy', 'Sutapa'). This expression checks if the value in the 'Name' column matches any of the specified names 'Dave', 'Nancy', or 'Sutapa'. Each name is enclosed in single quotes and separated by commas within parentheses, following the correct syntax for the IN operator.

Option A ('Dave', 'Nancy', 'Sutapa") IN Name uses incorrect syntax by enclosing the list of names in double quotes instead of single quotes. Option B ('Dave' OR 'Nancy' OR 'Sutapa') IN Name attempts to use OR logic within the parentheses, which is not the correct usage of the IN operator. Option D Name IN ('Dave' OR 'Nancy' OR 'Sutapa') also misuses the OR logic within the parentheses.

By selecting option C and using the expression Name IN ('Dave', 'Nancy', 'Sutapa'), we ensure that the SQL query accurately checks if the patient's name matches any of the specified names in the list.