You are managing a 24*7 database. The backup strategy for the database is to perform user-managed backups. Identify two prerequisites to perform the backups.（） The database must be opened in restricted mode.。 The database must be configured to run in ARCHIVELOG mode.。 The tablespaces are required to be in backup mode before taking the backup.。 The tablespaces are required to be in read-only mode before taking the backu。
生态系统发展
View the Exhibit. One of the important tables in the USERS tablespace was dropped and purged from the recycle bin at 9：00 a.m. You noticed this at 11：00 a.m. and you want to perform an incomplete recovery to recover the table. Which statement is true？（） You must recover all data files to the required system change number （SCN）.。 You must recover all data files， except those that are offline， to the required SCN .。 You must recover all data files belonging to the USERS tablespace to the required SCN.。 You cannot recover all data files because segment space management is performed manually for the undo tablespace.。
A toy manufacturing customer wants to run Microsoft SQL Server. Which category is applicable for such a solution？（） E-mail。 Database。 Network Infrastructure。 Systems Management。
资产评估的特点主要有（）。 市场性。 强制性。 公正性。 咨询性。 专业性。
下列哪一项是发现巨大血小板综合征的最简便试验（）
