单项选择题
A.The unit of versioning is the schema.
B.It is possible to version enable a table pertaining to SYS.
C.There are as many segments as versions for the same base table.
D.It is possible to create workspaces if there is no version-enabled table in the database.
多项选择题 Which three table transformations can be done using online redefinition of tables？（）
单项选择题 You have just run this syntax to start the listener from the Listener Control utility： LSNRCTL>START Starting /mstgelai/oracle/bin/tnslsnr： please wait… System parameter file is /u01/oracle/network/admin/listener.ora Log messages written to /u01/oracle/network/log/listener.log Listening on： （DESCRIPTION=（ADDRESS=（PROTOCOL=tcp）（HOST=stc-sun01-server）（PORT=1521））） Connecting to… The command completed successfully What is the name of the Listener you started？（）
单项选择题 In this scenario， assume that you archive logs 101 to 104 to two archiving destinations， /log1 and /log2. The control file contains archived log records as follows： Sequence Filename 101 /log1/log_1_101.arc 101 /log2/log_1_101.arc 102 /log1/log_1_102.arc 102 /log2/log_1_102.arc 103 /log1/log_1_103.arc 103 /log2/log_1_103.arc 104 /log1/log_1_104.arc 104 /log2/log_1_104.arc You accidentally delete logs 102 and 104 from log 1. You run this command： BACKUP ARCHIVELOG FROM SEQUENCE 101 UNTIL SEQUENCE 105； What happens？（）