树木栽植
Aligning data that must be preserved to the correct tier of storage until it is no longer useful is anexample of：（） Business Continuity。 Disaster Recovery Plan。 Storage Consolidation。 Information Lifecycle Management。
Which two statements about creating constraints are true?（） Constraint names must start with SYS_C。 All constraints must be defines at the column level.。 Constraints can be created after the table is created.。 Constraints can be created at the same time the table is created.。 Information about constraints is found in the VIEW_CONSTRAINTS dictionary view.。
家族企业最显著的特征是（）。 创业成本较低。 创始人是企业主要决策者。 心理契约成本较低。 家庭与企业的长远目标和利益的一致性。
You observe that database performance has degraded over a period of time. While investigating the reason， you find that the size of the database buffer cache is not large enough to cache all the needed data blocks. Which advisory component would you refer to， in order to determine the required size of the database buffer cache？（） Memory Advisor。 Segment Advisor。 SQL Tuning Advisor。 SQL Access Advisor。 Automatic Database Diagnostic Monitor （ADDM）。
Given a complete loss of your database， in what order would you need to perform the following RMAN operations to restore it？（）
a. restore controlfile
b. restore database
c. restore spfile
d. recover database
e. alter database open
f. alter database open resetlogs
