出自:Oracle认证
You need to create a table named ORDERS that contain four columns: 1. an ORDER_ID column of number data type 2. aCUSTOMER_ID column of number data type 3. an ORDER_STATUS column that contains a character data type 4. aDATE_ORDERED column to contain the date the order was placed. When a row is inserted into the table, if no value is provided when the order was placed, today's date should be used instead. Which statement accomplishes this? （）
A:CREATE TABLE orders ( order_id NUMBER (10), customer_id NUMBER (8), order_status VARCHAR2 (10), date_ordered DATE = SYSDATE);
B:CREATE TABLE orders ( order_id NUMBER (10), customer_id NUMBER (8), order_status VARCHAR2 (10), date_ordered DATE DEFAULT SYSDATE);
C:CREATE OR REPLACE TABLE orders ( order_id NUMBER (10), customer_id NUMBER (8), order_status VARCHAR2 (10), date_ordered DATE DEFAULT SYSDATE);
D:CREATE OR REPLACE TABLE orders ( order_id NUMBER (10), customer_id NUMBER (8), order_status VARCHAR2 (10), date_ordered DATE = SYSDATE);
E:CREATE TABLE orders ( order_id NUMBER (10), customer_id NUMBER (8), order_status NUMBER (10), date_ordered DATE = SYSDATE);
F:CREATE TABLE orders ( order_id NUMBER (10), customer_id NUMBER (8), order_status NUMBER (10), date_ordered DATE DEFAULT SYSDATE);
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?（）
A:Create the CREATE_TEST procedure with definer’s rights.
B:Grant the EXECUTE privilege to users with GRANT OPTION on the CREATE_TEST procedure.
C:Create the CREATE_TEST procedure with invoker’s rights.
D:Create the CREATE_TEST procedure as part of a package and grant users the EXECUTE privilege the package.
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What is required at line 5 in class SomeApp to use the process method of BitUtils?（）
What privileges does the user Scott have at this point?（）
You performed operations on the DEPT4 table as shown in the Exhibit. When you perform the FlashbackVersions Query， you find that the first two updates are not listed. What could be the reason？（）