In the following MySQL command how many rows will be updated? UPDATE person SET lname=’s’, Fname = ’p’, WHERE person_id = 1; /* person_id is a primary key */

Answer: Option A

This MySQL command is designed to update information in a table named "person".
Let's break down the command:
UPDATE person : This part tells MySQL to modify data in the "person" table.
SET lname='s', Fname='p' : This part specifies the changes to be made. It sets the "lname" (last name) column to 's' and the "Fname" (first name) column to 'p'.
WHERE person_id=1 : This is crucial! It restricts the update to only the row where "person_id" equals 1.
Since "person_id" is a primary key, it uniquely identifies each row in the table. This means only one row can have "person_id=1".
Therefore, the correct answer is Option A: Single row.
The command will update only the row with the primary key "person_id" equal to 1.