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[单选] In your database, the STATISTICS_LEVEL initialization parameter is set to BASIC.  What is the impact of this setting?()

A . The optimizer statistics are collected automatically.
B . Only the timed operating system (OS) statistics and plan execution statistics are collected.
C . The Oracle server dynamically generates the necessary statistics on tables as part of query optimization.
D . The snapshots for the Automatic Workload Repository (AWR) are not generated automatically. 
E . Snapshots cannot be collected manually by using DBMS_WORKLOAD_REPOSITORY PACKAGE.

监理实施细则应由()编制,经总监理工程师批准,在工程开工前完成,并报建设单位核备。 监理员。 专业监理工程师。 副总监。 监理机构。 An administrator plans to apply a fix pack to the PowerHA software using a rolling migration. At what stage ofthe migration is a cluster verification supported?() Individually before each node is upgraded。 Individually before and after each node is upgraded。 Individually after each node has been upgraded。 Collectively after all nodes have been upgraded。 Evaluate the SQL statement: TRUNCATE TABLE DEPT; Which three are true about the SQL statement? () It releases the storage space used by the table.。 It does not release the storage space used by the table.。 You can roll back the deletion of rows after the statement executes.。 You can NOT roll back the deletion of rows after the statement executes.。 An attempt to use DESCRIBE on the DEPT table after the TRUNCATE statement executes will display an error.。 You must be the owner of the table or have DELETE ANY TABLE system privileges to truncate the DEPT table。 When performing a full database disaster recovery with RMAN, in what order would you execute these steps?()   a. Restore the control file from autobackups.  b. Run the RMAN restore and recover command.  c.Restore the database spfile from autobackups.  d. Make the RMAN backup set pieces available.  e. Open the database with the alter database open resetlogs command.  f.Open the database with the alter database open command.   a, b, c, d, e, f。  c, d, a, b, f。  d, c, a, b, f。 d, b, d, c, e。 d, c, a, b, e。 化学毒物对膜生物物理性质的影响表现在:()。 影响膜通透性。 影响膜流动性。 影响膜组分。 影响膜表面电荷。 In your database, the STATISTICS_LEVEL initialization parameter is set to BASIC.  What is the impact of this setting?()
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