阅读以下关于数据库审计建设方面的叙述,回答问题1至问题3。 当前许多国家对数据库应用系统提出了明确的审计要求,要求数据库应用系统的DBA为财政、商业和卫生保健数据库保留审计跟踪信息,美国政府甚至要求保证长达7年的审计跟踪信息在线。 一般在数据库中只是插入审计跟踪信息。审计跟踪数据在正常操作期间(不管是OLTP还是数据仓库)从不获取,主要作为一种事后证据存放在磁盘上,占据一定甚至很大的磁盘空间,而且必须每个月或每年(或者间隔固定的一段时间)对其净化或归档。 当前的数据库审计功能主要采用了分区和段空间压缩技术。利用这些技术,数据库审计不仅是可以忍受的,而且很容易管理,并且将占用更少的空间。 按月对审计跟踪信息分区的方法是:在第一个业务月中,只是向分区表中插入审计信息,这个月结束后,向表中增加一个新的分区,以容纳下个月的审计信息并将上一个月的分区从可读写表空间移动到一个只读的表空间中。采用这种方式,就可以一个月备份一次该只读表空间。 如果采用本题所述的按月分区方法,请用300字以内的文字描述审计建设的表空间有哪些,并简述其作用,同时请说明段压缩技术在表空间创建中的具体应用。
The DBA issues this SQL command: CREATE USER scott IDENTIFIED by tiger; What privileges does the user Scott have at this point?()
You are a DBA of your company. You created a database named SALES on an Oracle 10g instance. You have defined an index named INDEX1 on the database table named INVENTORY. Users are complaining that queries accessing the INVENTORY table are running slow. Upon investigation you determine that the tablespace where the index is located is experiencing high I/O and you decide to relocate the index to another tablespace. Which of these will be the best way to accomplish this objective?()
You are working as a DBA on Oracle Database 9i. You plan to upgrade your 9i database to Oracle 10g. To be familiar with the new database technology, you decide to install Oracle Database 10g on your workstation at home. You create a general purpose database. After the installation, you make the following changes in your initialization parameter file:LOG_ARCHIVE_DEST_1=’LOCATION=USE_DB_RECOVERY_FILE_DEST’ DB_RECOVERY_FILE_DEST = ’LOCATION=d:/product/10.1.0/flash_recovery_area’ DB_RECOVERY_FILE_DEST_SIZE=10g Where are the archived redo logs stored for your database?()
As the DBA, you run the following query on your ASM instance. What is the implication of the results of the query?() SQL> select group_number, name, state from v$ASM_DISKGROUP; GROUP_NUMBER NAME STATE 0 DGROUP1 DISMOUNTED 2 DGROUP2 MOUNTED 3 DGROUP3 MOUNTED
You are the DBA for an academic database. You need to create a role that allows a group of users to modify existing rows in the STUDENT_GRADES table. Which set of statements accomplishes this? ()
The DBA is defining role for users. Which of the following is not an acceptable method for defining a default role?()
当前oracle数据库运行在open状态,LISTENER也正常运行,此刻一个dba执行如下命令LSNRCTL>STOP下面的描述中那个是正确的?()
什么样的人是DBA?
The DBA has chosen to manage SGA and PGA memory separately in an OLTP database because of his unique knowledge of the application. Which of these are good starting points to use when configuring the maximum values for SGA and PGA,based on the amount of memory available on the system?()