多项选择题
A.It is ignored by the query optimizer.
B.It is not used while the index is being rebuilt.
C.The index cannot be rebuilt， and has to be re-created.
D.The index is automatically rebuilt when used the next time
单项选择题 You are working on a new Oracle Database 11g server， where only the software is installed and no database iscreated. You plan to create a database on this server using the Database Configuration Assistant （DBCA）.Some of the requirements set for your database creation task are： 1.Configure the database to operate in shared server mode. 2.Disable automatic maintenance tasks such as optimizer statistics collection. 3.Configure a naming method to help the remote user connect to the database instance. 4.Use Automatic Storage Management （ASM） for storing the database files. 5.Configure daily database backup to flash recovery area. 6.Configure Enterprise Manager Database Control to manage the database. Which of these requirements can be met while creating the database（）
多项选择题 View the Exhibit. Which statements are true regarding the USERS tablespace（）
单项选择题 User A executes the following command to drop a large table in your database：SQL> DROP TABLE trans； While the drop table operation is in progress， user B executes the following command on the same table：SQL> DELETE FROM trans WHERE tr_type=’SL’； Which statement is true regarding the DELETE command（）