You create a table in your database that contains 50，000 rows approximately. The queries performed on the table are complex and performed on the table frequently. Which advisor helps you achieve the best performance of database for queries by recommending

第1题：

A warehouse fact table in your Oracle 12c Database is range-partitioned by month and accessed frequently with queries that span multiple partitions The table has a local prefixed, range partitioned index. Some of these queries access very few rows in some partitions and all the rows in other partitions, but these queries still perform a full scan for all accessed partitions. This commonly occurs when the range of dates begins at the end of a month or ends close to the start of a month. You want an execution plan to be generated that uses indexed access when only a few rows are accessed from a segment, while still allowing full scans for segments where many rows are returned. Which three methods could transparently help to achieve this result?（）

• A、Using a partial local Index on the warehouse fact table month column with indexing disabled to the table partitions that return most of their rows to the queries.
• B、Using a partial local Index on the warehouse fact table month column with indexing disabled for the table partitions that return a few rows to the queries.
• C、Using a partitioned view that does a UNION ALL query on the partitions of the warehouse fact table, which retains the existing local partitioned column.
• D、Converting the partitioned table to a partitioned view that does a UNION ALL query on the monthly tables, which retains the existing local partitioned column
• E、Using a partial global index on the warehouse fact table month column with indexing disabling for the table partitions that return most of their rows to the queries.
• F、Using a partial global index on the warehouse fact table month column with indexing disabled for the table partitions that return a few rows to the queries.

第2题：

Your database supports a DSS workload that involves the execution of complex queries: Currently, the library cache contains the ideal workload for analysis. You want to analyze some of the queries for an application that are cached in the library cache. What must you do to receive recommendations about the efficient use of indexes and materialized views to improve query performance?（）

• A、Create a SQL Tuning Set (STS) that contains the queries cached in the library cache and run the SQL Tuning Advisor (STA) on the workload captured in the STS.
• B、Run the Automatic Workload Repository Monitor (ADDM).
• C、Create an STS that contains the queries cached in the library cache and run the SQL Performance Analyzer (SPA) on the workload captured in the STS.
• D、Create an STS that contains the queries cached in the library cache and run the SQL Access Advisor on the workload captured in the STS.

第3题：

You work as a database administrator for Supportcenter.cn. You suspect that in one of your applications the customer table is being accessed by some unauthorized users. Which option would you use to monitor the queries being executed on the customer table？（）

• A、Monitor thealert.logfile
• B、Enable server-side SQL tracing for user sessions
• C、Enable fine-grained auditing for the customer table
• D、Enable Fine-Grained Access Control （FGAC） for the customer table
• E、Write a database trigger on the customer table on the SELECT event

第4题：

You have a very large table that your users access frequently. Which of the following advisors will recommend any indexes to improve the performance of queries against this table?（）

• A、The Automatic Memory Manager (AMM)
• B、The SQL Tuning Advisor
• C、The Segment Advisor
• D、The SQL Access Advisor

第5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. A SQL Server 2005 computer is managed by you， and a database named Customers is included by the SQL Server 2005 computer. A table named CustInfo is included by the database. An identity column named CustID and an nvarchar column named CustName are included by the table. According to the company requirement， rows which duplicate CustName values are included should be moved from the CustInfo table every year. However， the company requests to have rows removed from the CustInfo table after the rows have been manually examined and verified as being duplicates. Since you are the technical support， you are required to think out a method to have potential duplicate rows identified for manual examination. The minimum amount of administrative effort should be utilized.  Which action should be performed to finish the task？（）

• A、A trigger should be created for the CustInfo table so as to roll back INSERT queries that duplicate data is included.
• B、A new unique index should be created on the CustName column. And then， IGNORE_DUP_KEY = ON should be specified when creating index.
• C、On the CustName column， a foreign key constraint should be created， and a distinct list of CustName values is referenced by the foreign key constraint.
• D、A SELECT INTO query should be utilized， and GROUP BY and HAVING clauses should be included by the query to create a new table that contains duplicate rows from the CustInfo table.

第6题：

A Windows Azure application retrieves data from SQL Azure.   You need to recommend an approach for improving application query performance.  What should you recommend？（）

• A、 Create a database view to retrieve the data.
• B、 Use a clustered index on the SQL Azure database tables.
• C、 Open a new database connection when an operation times out.
• D、 Create SQL Azure database table indexes basedon application queries

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第13题：

You find today’s performance of your production database to be the best ever. Therefore， you want to be notified in the future whenever the performance degrades by 10% of today’s performance. What is the first step that you would take to ensure this？（）

• A、create baseline metrics for today’s performance
• B、write the current database metrics to a database table and create a trigger to compare with future database statistics
• C、write the current database metrics to a flat file and create an operating script to compare with future database statistics
• D、write the current database metrics to a database table and create a procedure to compare with future database statistics
• E、write the current database metrics to a database table and submit a job using DBMS_JOB to compare with future database statistics

第14题：

In one of your online transaction processing （OLTP） applications， users are manipulating and querying a database table simultaneously. From the Segment Advisor， you find that one of the tables is highly fragmented and you want to shrink the table immediately without affecting the currently active queries.  Which option would you use with the ALTER TABLE command to achieve this objective？（）

• A、REBUILD
• B、CASCADE
• C、TRUNCATE
• D、ROW MOVEMENT
• E、SHRINK SPACE COMPACT
• F、SHRINK SPACE CASCADE

第15题：

Which three tasks can be performed by using the performance Schema?（）

• A、Finding queries that are not using indexes
• B、Finding rows that are locked by InnoDB
• C、Finding client connection attributes
• D、Finding the part of a code in which a single query is spending time
• E、Finding the size of each table

第16题：

You are designing an application for Certkiller .com and you have been asked to design a database table to facilitate monthly bill generation. The bill would include details of customer calls， listed in chronological order.Which method would you follow to achieve this objective without increasing the overhead of sorting the rows？（）

• A、 create a hash cluster to store the data
• B、 create an index cluster to store the data
• C、 create a partitioned table to store the data
• D、 create a sorted hash cluster to store the data
• E、 create a heap table with rowid to store the data

第17题：

You work in a company which is named Wiikigo Corp. The company uses SQL Server 2008. You are the administrator of the company database. Now you are in charge of a SQL Server 2008 instance. There is a database which is named Sellings in the instance. The Sellings database contains a table named Productions. The table is used to stores information about all types of products. The Productions table is often queried by users on the basis of the RadioSize column. The RadioSize column contains the NULL value for all products other than Radios. Currently no index exists on the RadionSize column. According to the requirement of the company CIO, you have to optimize the query performance and reduce the effect on the disk space to the least. So what action should you perform to achieve this goal?（）  

• A、On the Products table, you should create a view. 
• B、On the RadioSize column, you should create a clustered index 
• C、On the RadioSize column, you should create a filtered index 
• D、On the RadioSize column, you should create a unique clustered index

第18题：

You work in a company which uses SQL Server 2008. You are the administrator of the company database. Now you are in charge of a SQL Server 2008 instance. There is a n On-Line Analytical Processing （OLAP） database named in the instance. The database contains a dimension table named Clients. Ever hour backup of data of the Clients table is performed. But the Clinets table contains redundant data. You must keep the disk space used to store the Clients table.  In the options below， which compression technology should you use？（）

• A、You should use row compression 
• B、You should use page compression 
• C、You should use backup compression 
• D、You should use windows NTFS file system compression

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