View the Exhibit and examine the description for the CUSTOMERS table.
You want to update the CUST_INCOME_LEVEL and CUST_CREDIT_LIMIT columns for the
customer with the CUST_ID 2360. You want the value for the CUST_INCOME_LEVEL to have the
same value as that of the customer with the CUST_ID 2560 and the CUST_CREDIT_LIMIT to
have the same value as that of the customer with CUST_ID 2566.
Which UPDATE statement will accomplish the task?
A.
UPDATE customers
SET cust_income_level = (SELECT cust_income_level
FROM customers
WHERE cust_id = 2560),
cust_credit_limit = (SELECT cust_credit_limit
FROM customers
WHERE cust_id = 2566)
WHERE cust_id=2360;
B.
UPDATE customers
SET (cust_income_level,cust_credit_limit) = (SELECT
cust_income_level, cust_credit_limit
FROM customers
WHERE cust_id=2560 OR cust_id=2566)
WHERE cust_id=2360;
C.
UPDATE customers
SET (cust_income_level,cust_credit_limit) = (SELECT
cust_income_level, cust_credit_limit
FROM customers
WHERE cust_id IN(2560, 2566)
WHERE cust_id=2360;
D.
UPDATE customers
SET (cust_income_level,cust_credit_limit) = (SELECT
cust_income_level, cust_credit_limit
FROM customers
WHERE cust_id=2560 AND cust_id=2566)
WHERE cust_id=2360;
Explanation:
Updating Two Columns with a Subquery
You can update multiple columns in the SET clause of an UPDATE statement by writing multiple
subqueries. The syntax is as follows:
UPDATE table
SET column =
(SELECT column
FROM table
WHERE condition)
[ ,
column =
(SELECT column
FROM table
WHERE condition)]
[WHERE condition ] ;
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