单项选择题 You are creating an online catalog application that will display product information on the company Web site. The product data is stored in a SQL Server 2005 database. The data is stored as relational data but must be passed to the application as an XML document by using FOR XML. You test your application and notice that not all of the items matching your query appear in the XML document. Only those products that have values for all elements in the schema appear.   You need to modify your Transact-SQL statement so that all products matching your query appear in the XML document. What should you do？（）

单项选择题 You are creating a stored procedure that will delete data from the Contact table in a SQL Server 2005 database. The stored procedure includes the following Transact-SQL statement to handle any errors that occur. BEGIN TRY   BEGIN TRANSACTION   DELETE FROM Person.Contact WHERE ContactID = @ContactID COMMIT TRANSACTION END TRY   BEGIN CATCH   DECLARE @ErrorMessage nvarchar（2000） DECLARE @ErrorSeverity int DECLARE @ErrorState int SELECT @ErrorMessage = ERROR MESSAGE（），@ErrorSeverity=ERROR SEVERITY（），@ErrorState = ERROR STATE（） RAISERROR （@ErrorMessage， @ErrorSeverity， @ErrorState） END CATCH；      You test the stored procedure and discover that it leaves open transactions. You need to modify the stored procedure so that it properly handles the open transactions. What should you do？（）

单项选择题 You work for a company that sells books. You are creating a report for a SQL Server 2005 database. The report will list sales representatives and their total sales for the current month. The report must include only those sales representatives who met their sales quota for the current month. The monthly sales quota is $2，000. The date parameters are passed in variables named @FromDate and @ToDate.   You need to create the report so that it meets these requirements. Which SQL query should you use？（）