微軟認證sql考試練習試題及答案

　　第1題

　　公司在數(shù)據(jù)庫中存儲供應商和價格信息。數(shù)據(jù)庫中的所有商品都有牌價(list price)。 你需要只將供應商Fabrikam的所有產(chǎn)品的牌價提高20.00。應使用哪個查詢?

　　A. UPDATE Production.Product SET ListPrice = ListPrice + 20.00 WHERE NOT EXISTS ( SELECT VendorId FROM Purchasing.Vendor WHERE VendorName = ’Fabrikam’);

　　B. UPDATE Production.Product SET ListPrice = ListPrice + 20.00 WHERE VendorId NOT IN ( SELECT VendorId FROM Purchasing.Vendor WHERE VendorName = ’Fabrikam’);

　　C. UPDATE Production.Product SET ListPrice = ListPrice + 20.00 WHERE EXISTS ( SELECT VendorId FROM Purchasing.Vendor WHERE VendorName = ’Fabrikam’);

　　D. UPDATE Production.Product SET ListPrice = ListPrice + 20.00 WHERE VendorId IN (SELECT VendorId FROM Purchasing.Vendor WHERE VendorName = ’Fabrikam’);

　　答案：D

　　第2題

　　你有名為Customer和SalesOrder的兩個表。 你需要找出尚未采購任何東西的所有客戶， 以及那些訂單總額 (OrderTotal) 不到100的客戶。應使用哪個查詢?

　　A. SELECT * FROM Customer WHERE 100 > ALL ( SELECT OrderTotal FROM SalesOrder WHERE Customer.CustomerID = SalesOrder.CustomerID)

　　B. SELECT * FROM Customer WHERE 100 > SOME ( SELECT OrderTotal FROM SalesOrder WHERE Customer.CustomerID = SalesOrder.CustomerID)

　　C. SELECT * FROM Customer WHERE 100 > ( SELECT MAX(OrderTotal) FROM SalesOrder WHERE Customer.CustomerID = SalesOrder.CustomerID)

　　D. SELECT * FROM Customer WHERE EXISTS ( SELECT SalesOrder.CustomerID FROM SalesOrder WHERE Customer.CustomerID = SalesOrder.CustomerID AND SalesOrder.OrderTotal <= 100)

　　答案：A

　　第3題

　　你有名為Customer和SalesOrder的兩個表。Customer表中有1000個客戶，SalesOrder表中有其中900個客戶的訂單。你 執(zhí)行下面的查詢來列出至少有一筆銷售的所有客戶。 SELECT * FROM Customer WHERE Customer.CustomerID IN (SELECT Customer.CustomerID FROM SalesOrder)

　　你需要確定查詢的結(jié)果。該查詢應返回什么結(jié)果?

　　A. 沒有行

　　B. 警告消息

　　C. Customer表中的1000行

　　D. Customer表中與SalesOrder表中的行匹配的900行。

　　答案：C

　　第4題

　　Customer表中有下面的行：CustomerId Status 1 Active 2 Active 3 Inactive 4 NULL 5 Dormant 6 Dormant 你編寫了下面 的查詢來返回狀態(tài)不為NULL或“Dormant”的所有客戶： SELECT * FROM Customer WHERE Status NOT IN (NULL, ’Dormant’) 你需要確定查詢的結(jié)果。你預計應出現(xiàn)哪個結(jié)果?

　　A. CustomerId Status

　　B. CustomerId Status 1 Active 2 Active 3 Inactive

　　C. CustomerId Status 1 Active 2 Active 3 Inactive 4 NULL

　　D. CustomerId Status 1 Active 2 Active 3 Inactive 4 NULL 5 Dormant 6 Dormant

　　答案：B

　　第5題

　　你有一個名為Employee的表。 你將每個員工的經(jīng)理EmployeeID插入ReportsTo列來記錄公司的組織層次結(jié)構(gòu)。你需要 編寫遞歸查詢來生成員工及其經(jīng)理的列表。 該查詢還必須包含員工在層次結(jié)構(gòu)中的級別。 你編寫了下面的代碼片段。 (包含的行號僅供參考。) 01 WITH EmployeeList (EmployeeID, FullName, ManagerName, Level)02 AS (03 ......... 04 )05 SELECT EmployeeID, FullName, ManagerName, Level06 FROM EmployeeList; 應在第3行插入哪一個代碼片段?

　　A. SELECT EmployeeID, FullName, ’’ AS [ReportsTo], 1 AS [Level] FROM Employee WHERE ReportsTo IS NULL UNION ALL SELECT emp.EmployeeID, emp.FullNName, mgr.FullName, 1 + 1 AS [Level] FROM Employee emp JOIN Employee mgr ON emp.ReportsTo = mgr.EmployeeID

　　B. SELECT EmployeeID, FullName, ’’ AS [ReportsTo], 1 AS [Level] FROM Employee WHERE ReportsTo IS NULL UNION ALL SELECT emp.EmployeeID, emp.FullName, mgr.FullName, mgr.Level + 1 FROM EmployeeList mgr JOIN Employee emp ON emp.ReportsTo = mgr.EmployeeId

　　C. SELECT EmployeeID, FullName, ’’ AS [Reports To], 1 AS [Level] FROM Employee UNION ALL SELECT emp.EmployeeID, emp.FullName, mgr.FullName, 1 + 1 AS [Level] FROM Employee emp LEFT JOIN Employee mgr ON emp.ReportsTo = mgr.EmployeeID

　　D. SELECT EmployeeID, FullName, ’’ AS [ReportsTo], 1 AS [Level] FROM Employee UNION ALL SELECT emp.EmployeeID, emp.FullName, mgr.FullName, mgr.Level + 1 FROM EmployeeList mgr JOIN Employee emp ON emp.ReportsTo = mgr.EmployeeID

　　答案：B

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