Examine the commands executed in the following sequence： 1：SQL> CREATE ROLE mgrrole； 2：SQL> GRANT create user，select any table，connect，resource TO mgrrole； 3：SQL> GRANT select，update ON sh.sales TO mgrrole； 4：SQL> CREATE ROLE ceo IDENTIFIED BY boss； 5：SQL> GRANT mgrrole，drop any table，create any directory TO ceo； 6：SQL> GRANT ceo TO mgrrole； Which statement is true about the above commands（） The commands execute successfully.。 Command 6 produces an error because of circular role grant.。 Command 5 produces an error because a role cannot be granted to another role.。 Command 3 produces an error because the MGRROLE role already contains system privileges.。 The table created by HR remains and HR still has the CREATE TABLE system privilege.。 The table created by HR remains and HR can grant the CREATE TABLE system privilege to other users.。
工程移交后，项目法人以及其他参建单位应当按照法律法规的规定和合同约定，承担保修责任。
The SQL Tuning Advisor has been configured with default configurations in your database instance. Which recommendation is automatically implemented without the DBA’s intervention after the SQL Tuning Advisor is run as part of the AUTOTASK framework？（） statistics recommendations。 SQL profile recommendations。 index-related recommendations。 restructuring of SQL recommendatio。
You want to make sure that your database backup does not exceed 10 hours in length. What command would you issue that would meet this condition?（） backup database plus archivelog。 backup database plus archivlog until time ‘10:00‘。 backup database plus archivelog timeout ‘10:00‘。 backup database plus archivelog duration 10:00。
为了解决从动轴瞬时角速度变化的问题，不能使用下列（）。 高精度凸缘式联轴器。 齿轮式联轴器。 成对万向联轴器。 十字滑块式联轴器。
Indentify two advantages of using recovery catalog instead of the control file of the database in RecoveryManager (RMAN).（）(Choose two.)
