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执行下列语句段后,输出字符“*”的个数是 for(inti=50;i>1;i-=2)tout<<'*';A.24B.25C.26D.50

执行下列语句段后,输出字符“*”的个数是 for(inti=50;i>1;i-=2)tout<<'*';

A.24

B.25

C.26

D.50

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第1题

User Mary has a view called EMP_DEPT_LOC_VU that was created based on the EMPLOYEES, DEPAR
TMENTS, and LOCATIONS tables. She has the privilege to create a public synonym, and would like to create a synonym for this view that can be used by all users of the database. Which SQL statement can Mary use to accomplish that task?()

A. CREATE PUBLIC SYNONYM EDL_VU ON emp_dept_loc_vu

B. CREATE PUBLIC SYNONYM EDL:VU FOR mary (emp_dept_loc_vu);

C. CREATE PUBLIC SYNONYM EDL_VU FOR emp _dept_loc_vu;

D. CREATE SYNONYM EDL_VU ON emp_dept_loc_vu FOR EACH USER;

E. CREATE SYNONYM EDL_VU FOR EACH USER ON emp_dept_loc_vu

F. CREATE PUBLIC SYNONYM EDL_VU ON emp_dept_loc_vu FOR ALL USERS;

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第2题

User Mary has a view called EMP_DEPT_LOC_VU that was created based on the EMPLOYEES, DEPAR
TMENTS, and LOCATIONS tables. She has the privilege to create a public synonym, and would like to create a synonym for this view that can be used by all users of the database.Which SQL statement can Mary use to accomplish that task?()

A. CREATE PUBLIC SYNONYM EDL_VU ON emp_dept_loc_vu

B. CREATE PUBLIC SYNONYM EDL:VU FOR mary (emp_dept_loc_vu);

C. CREATE PUBLIC SYNONYM EDL_VU FOR emp _dept_loc_vu;

D. CREATE SYNONYM EDL_VU ON emp_dept_loc_vu FOR EACH USER;

E. CREATE SYNONYM EDL_VU FOR EACH USER ON emp_dept_loc_vu

F. CREATE PUBLIC SYNONYM EDL_VU ON emp_dept_loc_vu FOR ALL USERS;

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第3题

Which is a valid CREATE TABLE statement? ()

A. CREATE TABLE EMP9$# AS (empid number(2));

B. CREATE TABLE EMP*123 AS (empid number(2));

C. CREATE TABLE PACKAGE AS (packid number(2));

D. CREATE TABLE 1EMP_TEST AS (empid number(2));

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第4题

Which SQL statement defines the FOREIGN KEY constraint on the DEPTNO column of the EMP table? ()

A. CREATE TABLE EMP (empno NUMBER(4), ename VARCNAR2(35), deptno NUMBER(7,2) NOT NULL CONSTRAINT emp_deptno_fk FOREIGN KEY deptno REFERENCES dept deptno);

B. CREATE TABLE EMP (empno NUMBER(4), ename VARCNAR2(35), deptno NUMBER(7,2) CONSTRAINT emp_deptno_fk REFERENCES dept (deptno));

C. CREATE TABLE EMP (empno NUMBER(4) ename VARCHAR2(35), deptno NUMBER(7,2) NOT NULL, CONSTRAINT emp_deptno_fk REFERENCES dept (deptno) FOREIGN KEY (deptno));

D. CREATE TABLE EMP (empno NUMBER(4), ename VARCNAR2(35), deptno NUMBER(7,2) FOREIGN KEY CONSTRAINT emp deptno fk REFERENCES dept (deptno));

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第5题

Examine the SQL statement that creates ORDERS table:CREATE TABLE orders (SER_NO NUMBER UNI

Examine the SQL statement that creates ORDERS table:CREATE TABLE orders (SER_NO NUMBER UNIQUE, ORDER_ID NUMBER, ORDER_DATE DATE NOT NULL, STATUS VARCHAR2(10) CHECK (status IN (‘CREDIT‘, ‘CASH‘)), PROD_ID NUMBER REFERENCES PRODUCTS(PRODUCT_ID), ORD_TOTAL NUMBER, PRIMARY KEY (order_id, order_date));For which columns would an index be automatically created when you execute the above SQL statement? ()

A. SER_NO

B. ORDER_ID

C. STATUS

D. PROD_ID

E. ORD_TOTAL

F. composite index on ORDER_ID and ORDER_DATE

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第6题

Examine the structure of the STUDENTS table:You need to create a report of the 10 students
who achieved the highest ranking in the course INT SQL and who completed the course in the year 1999.Which SQL statement accomplishes this task?()

A.

B.

C.

D.

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