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Which Transact-SQL query should you use?

You develop a Microsoft SQL Server 2012 database that contains tables named Customers and
Orders. The tables are related by a column named CustomerId.
You need to create a query that meets the following requirements:
Returns the CustomerName for all customers and the OrderDate for any orders that they have
placed.
Results must not include customers who have not placed any orders.
Which Transact-SQL query should you use?

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A.
SELECT CustomerName, OrderDate
FROM Customers
LEFT OUTER JOIN Orders
ON Customers.CuscomerlD = Orders.CustomerId

B.
SELECT CustomerName, OrderDate
FROM Customers
RIGHT OUTER JOIN Orders
ON Customers.CustomerID = Orders.CustomerId

C.
SELECT CustomerName, OrderDate
FROM Customers
CROSS JOIN Orders
ON Customers.CustomerId = Orders.CustomerId

D.
SELECT CustomerName, OrderDate
FROM Customers
JOIN Orders
ON Customers.CustomerId = Orders.CustomerId

Explanation:
http://msdn.microsoft.com/en-us/library/ms177634.aspx

One Comment on “Which Transact-SQL query should you use?

  1. Peter says:

    “Results must not include customers who have not placed any orders” – it will be answer with inner join {no left/right outer join}.

    ‘d’ is correct.




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