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Question
Which of the following SQL statements is a correctly stated correlated subquery?A) SELECT C1.CustName, C1.SalesRepNo
FROM CUSTOMER C1
WHERE C1.SalesRepNo IN
(SELECT S1.SalesRepNo
FROM SALESREP S1
WHERE S1.RepName = 'Smith');
B) SELECT C1.CustName, C1.SalesRepNo
FROM CUSTOMER C1
WHERE C1.SalesRepNo IN
(SELECT S1.SaleRepNo
FROM SALESREP S1
WHERE S1.RepName = 'Smith')
AND C1.SalesRepNo=S1.SalesRepNo);
C) SELECT C1.CustName, C1.SalesRepNo
FROM CUSTOMER C1
WHERE C1.SalesRepNo IN
(SELECT S1.SaleRepNo
FROM SALESREP S1
WHERE S1.RepName = 'Smith')
AND C1.SalesRepNo<>S1.SalesRepNo);
D) SELECT C1.CustName, C1.SalesRepNo
FROM CUSTOMER C1
WHERE C1.SalesRepNo IN
(SELECT C2.SaleRepNo
FROM CUSTOMER C2
WHERE C1.SalesRepNo=C2.SalesRepNo);
AND C1.OrderNo<>C2.OrderNo);
Answer
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