Your database is in NOARCHIVELOG mode. You start to do a backup, but your users complain that they dont want you to shut down the database to perform the backup. What options are available to you?() Put the database in hot backup mode and perform an online backup,including backing up the archived redo logs.。 Just back up the database datafiles without shutting down the database.。 You will have to wait until you can shut down the database to perform the backup.。 Mark each datafile as backup in progress, back them up individually,and then mark them as backup not in progress. No archived redo logs will need to be backed up.。 Only back up the datafiles that the user will not be touching. Once the user has finished what they were doing,you can shut down the database and back up the datafiles the user changed during the course of the remaining backu。
由某企业承建的某多功能现代化商务综合大厦,地上46层,地下3层,基础形式为桩基础,主体为全现浇钢筋混凝土框架一剪力墙结构.主体结构采用泵送混凝土等新技术。建筑物周边都十分接近规划红线,周边建筑及地下管线对因工程基坑开挖引起的地层变形移动十分敏感,且基坑北面临近地铁。在工程施工中发生如下事件:
事件一:该工程地下室基坑开挖深度较大,为确保基坑开挖安全编制了专项施工方案,并由安全总监签字确认后实施。考虑到现场的复杂性,施工单位在施工过程中加强了基坑监测。
事件二:根据施工情况,将混凝土墙体施工缝设置在地下室底板与墙体交接处。
事件三:在进行基础工程桩基验收时,发现部分桩有颈缩现象,个别桩身发生断裂,施工单位及时作了处理,经重新验收全部合格。指出事件一中有哪些不妥之处,并说明理由。
You want to create a consumer group, GROUP1, and you execute the following command in the commandline interface: SQL> EXEC DBMS_RESOURCE_MANAGER.CREATE_CONSUMER_GROUP (CONSUMER_GROUP =>’group1’, COMMENT => ’New Group’); This command errors out displaying the following message: ERROR at line 1: ORA29371: pending area is not active ORA06512: at "SYS.DBMS_RMIN", line 115 ORA06512: at "SYS.DBMS_RESOURCE_MANAGER", line 108 ORA06512: at line 1 What action would you take to overcome this error?() create the Pending Area before creating the consumer group。 activate the Pending Area before creating the consumer group。 increase the size of the large pool to accommodate the Pending Area。 increase the size of the shared pool to accommodate the Pending Area。 increase the size of the database buffer cache to accommodate the Pending Area。
检验统计量实质上是()。 点估计量。 标准化后的点估计量。 总体参数。 样本均值。
书面的商业计划对于确保系统覆盖新企业的重要特征是必不可少的。
土地、矿藏等资源性资产不适用成本法的原因是这些资产()或()。