View the Exhibit and examine the structure of ORDERS and CUSTOMERS tables.
Evaluate the following UPDATE statement:
UPDATE
(SELECT order_date, order_total, customer_id
FROM orders)
SET order_date = 22-mar-2007′
WHERE customer_id =
(SELECT customer_id
FROM customers
WHERE custjast_name = ‘Roberts’AND
Credit_limit = 600);
Which statement is true regarding the execution of the above UPDATE statement?
A.
It would not execute because two tables cannot be used in a single UPDATE
statement.
B.
It would execute and restrict modifications to only the columns specified in the
SELECT statement.
C.
It would not execute because a subquery cannot be used in the WHERE clause of an
UPDATE statement.
D.
It would not execute because the SELECT statement cannot be used in place of the
table name.
B