Question

Which of the following is a valid SQL statement based upon the contents of the customers table?

a) SELECT * FROM customers WHERE city = 'New York'
b) UPDATE customers SET name = 'John Doe' WHERE customer_id = 123
c) DELETE FROM customers WHERE state = 'CA'
d) INSERT INTO customers (name, email) VALUES

Answer 1

Options a), b), and c) are potentially valid SQL statements if they conform to the column structure of the customers table; option d) is incomplete and not valid as it lacks the necessary VALUES part.

Step-by-step explanation:

The given SQL statements should be examined to see if they are properly structured and make sense based on the assumed schema of the customers table. The correct answer will be a statement that abides by SQL syntax and refers to columns that would typically exist in a customers table.

• SELECT * FROM customers WHERE city = 'New York' is a plausible query that retrieves all records from the customers table where the city column equals 'New York'.
• UPDATE customers SET name = 'John Doe' WHERE customer_id = 123 would modify the name of the customer with the specified customer_id to 'John Doe'. This is a valid SQL UPDATE statement, assuming customer_id is a column in the table.
• DELETE FROM customers WHERE state = 'CA' is a DELETE statement that removes rows from the customers table where the state column equals 'CA'.
• INSERT INTO customers (name, email) VALUES is incomplete and missing the required data to insert, making it an invalid SQL statement.

Based on this, options a), b), and c) can be considered valid SQL statements assuming the columns referenced exist in the customers table, and the syntax aligns with the database being used. Option d) is evidently incomplete and thus not a valid SQL statement as it stands.