Will the following SQL command produce any error?

INSERT INTO person
(person_id, fname,lname)
VALUES (1,’S’,’U’),
VALUES (2,’T’,’U’);
/* where person_id is a primary key */

This question is about understanding how MySQL handles INSERT statements with multiple VALUES clauses.

Let's break down the code:

* INSERT INTO person (person_id, fname, lname): This part tells MySQL we want to add data into the "person" table, specifically to the columns "person_id", "fname", and "lname".
* VALUES (1, 'S', 'U'), VALUES (2, 'T', 'U');: This is where the problem lies. We're trying to insert two rows of data at once, but the syntax is incorrect. In MySQL, you can't use multiple VALUES clauses within a single INSERT statement.

Therefore, the correct answer is Option A: Error.

Why is this an error?

MySQL expects only one set of values to be provided with each INSERT statement. The second VALUES clause would be interpreted as a separate, invalid statement.

How to fix it?

To insert multiple rows correctly, use a single VALUES clause with multiple sets of values separated by commas:

```sql INSERT INTO person (person_id, fname, lname) VALUES (1, 'S', 'U'), (2, 'T', 'U'); ```

This will insert both rows of data correctly.

Remember: Understanding the correct syntax for SQL statements is crucial for avoiding errors and ensuring your data is handled properly.