多项选择题
A.No index would be created or used in this case.
B.A unique index on the empno column would be created.
C.A CHECK constraint would be enforced on the empno column.
D.A NOT NULL constraint would be enforced on the empno column.
E.A bitmap unique index would be created on the empno column.
多项选择题 You are creating a locally managed tablespace to meet the following requirements： All the extents should be of the same size. The data should be spread across two data files. A bitmap should be used to record the free space within the allocated extents. Which three options would you choose？（）
单项选择题 Inyourdatabase，youdiscoveredthatatempfileinalocallymanagedtemporarytablespacehasbeendeletedattheoperatingsystemlevel.Howwouldyourecoverthetablespace？（）
多项选择题 our database is in the MOUNT state and you execute the following command to open it： ALTER DATABASE OPEN What two actions are performed as a result of this command？（）
