单项选择题
A.In a SQL Trace log file， you should look for queries with low duration values and high read and write values.
B.In a query execution plan， you should look for queries with missing or out-of-date statistics.
C.In a SQL Trace log file， you should look for queries with high duration values and low read and write values.
D.In a query execution plan， you should look for queries with a large number of table scans.
单项选择题 You are a professional level SQL Server 2005 database administrator in an international corporation named Wiikigo. You are experienced in implementing high-availability solutions， monitoring the database server， and design deployment. In the company， you major job is the deployment， maintenance and support of Microsoft SQL Server 2005. You work as a database administrator for your company. You utilize the SP：Recompile event class to run SQL Server Profiler. You find that a great amount of recompiles occurring. The possible causes of the large number of recompiles should be identified. From the flowing four options， which one is the most possible cause of the problem？（）
单项选择题 You are a professional level SQL Server 2005 database administrator in an international corporation named Wiikigo. You are experienced in implementing high-availability solutions， monitoring the database server， and design deployment. In the company， you major job is the deployment， maintenance and support of Microsoft SQL Server 2005.You work as a database administrator for your company. You find a problem that when the following query is executed， a SQL Server 2005 application will perform slowly. SELECT * FROM Orders WHERE OrderStatus = ’InProgress’ This query is executed by the application as an ad hoc query. In most occasions， this query performs much more quickly. The company has the OrderStatus column indexed. The value InProgress is included by only a small number of the rows. Nevertheless， the OrderStatus column index which is the most ideal for this query is not being utilized. The performance of this query should be enhanced. However， the application that executes the query should not be changed. In addition， the effect on end users should be cut to the least. Which action should be performed to finish the task？（）
单项选择题 You are a professional level SQL Server 2005 database administrator in an international corporation named Wiikigo. You are experienced in implementing high-availability solutions， monitoring the database server， and design deployment. In the company， you major job is the deployment， maintenance and support of Microsoft SQL Server 2005.You work as the administrator of a SQL Server 2005 computer， and the computer is called SQL01. The users complain the slow response of all client applications which connect to SQL01. You find that the CPU and memory utilization of SQL01 is low. In addition， the disk activity is low. The cause of the performance problem should be identified. Which action should be performed？（）