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[单选] 广州是隋唐时期“海上丝绸之路”的重要港口,这条“海上丝绸之路”()。

A . 取代陆路“丝绸之路”,成为当时唯一的对外商路
B . 是通向日本,朝鲜的主要商路
C . 最远可抵达非洲东海岸
D . 可到达波斯湾

In your multitenant container database (CDB) containing pluggable database (PDBs), the HR user executes the following commands to create and grant privileges on a procedure: CREATE OR REPLACE PROCEDURE create_test_v (v_emp_id NUMBER, v_ename VARCHAR2,v_SALARY NUMBER, v_dept_id NUMBER) BEGIN INSERT INTO hr.test VALUES (V_emp_id, V_ename, V_salary, V_dept_id); END; / GRANT EXECUTE ON CREATE_TEST TO john, jim, smith, king; How can you prevent users having the EXECUTE privilege on the CREATE_TEST procedure from inserting values into tables on which they do not have any privileges?() Create the CREATE_TEST procedure with definer’s rights.。 Grant the EXECUTE privilege to users with GRANT OPTION on the CREATE_TEST procedure.。 Create the CREATE_TEST procedure with invoker’s rights.。 Create the CREATE_TEST procedure as part of a package and grant users the EXECUTE privilege the package.。 根据基本法,中央政府在香港特区内拥有哪些权力? You want to create a consumer group, GROUP1, and you execute the following command in the command-line interface:  SQL> EXEC DBMS_RESOURCE_MANAGER.CREATE_CONSUMER_GROUP (CONSUMER_GROUP =>’group1’, COMMENT => ’New Group’);  This command errorsout displaying the following message:  ERROR at line 1:  ORA-01031: insufficient privileges  ORA-06512: at "SYS.DBMS_RMIN", line 115  ORA-06512: at SYS.DBMS_RESOURCE_MANAGER", line 108 ORA-06512: at line 1  What action would you take to overcome this error?()  grant SYSDBA to the user。  grant SYSOPER to the user。  grant the RESOURCE role to the user。  use the GRANT command to grant the ADMINISTER_RESOURCE_MANAGER privilege to the use。  grant the ADMINISTER_RESOURCE_MANAGER privilege to the user by using the DBMS_RESOURCE_MANAGER_PRIVS package。 You work as a database administrator for Certkiller .com. One of the user sessions was terminated abnormally in the middle of a transaction. What does Oracle database do to recover it?() Uses undo data for roll forward。 Uses Flashback Log for recovery。 Uses online redo logs to roll back。 Uses undo data to roll back the transaction。 Uses Recovery Manager (RMAN) to roll back。 Uses the System Monitor (SMON) background process to perform instance recovery。 说明固相反应的步骤 广州是隋唐时期“海上丝绸之路”的重要港口,这条“海上丝绸之路”()。
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