You want to track and store all transactional changes to a table over its lifetime. To accomplish this task, you enabled Flashback Data Archive with the retention of 5 years. After some time, the business requirement changed and you are asked to change the retention period from 5 years to 3 years. To accomplish this, you issued the following command: ALTER FLASHBACK ARCHIVE fla1 MODIFY RETENTION 3 YEARS; What is the outcome of this command?（） The command produces an error because the retention period cannot be reduced。 All historical data older than 3 years is purged from the flashback archive FLA1。 All historical data is retained but the subsequent flashback data archives are maintained for only 3 years。 All historical data is transferred to flashback logs and the flashback archive is refreshed to set a new retention time。
工程款项的支付，除非变更项目的单价，不允许采用工程量清单中单价以外的任何价格。
Which best describes the main purpose of Service Update Management Assistant （SUMA）？（） Schedules the install AIX APARs and updates。 Automatically installs AIX APARs and updates via the HMc。 Schedules and automates the download of AIX APARS and updates。 Automatically queries existing machines and alerts when APARS and updates are available。
What is the minimum number of CECs required to avoid single points of failure on a Power 570 server？（） 1。 2。 3。 4。
建设单位必须在施工前将施工图设计文件送政府有关部门审查，未经审查或审查不合格的，不准使用，否则，将追究建设单位的法律责任。
Which of these appropriately describes the results of a manual SQL Tuning Advisor task？（）
