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单选题
当你执行以下查询语句：SELECT employeesno，ename FROM employees WHERE employeesno=7782 OR employeesno=7876；在WHERE语句中，以下哪个操作符可以取代OR？（）
A
IN
B
BETWEEN……and
C
LIKE
D
<=
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考题
当你执行以下查询语句:SELECT employeesno,ename FROM employees WHERE employeesno=7782 OR employeesno=7876;在WHERE语句中,以下哪个操作符可以取代OR?()
A.INB.BETWEEN……andC.LIKED.=
考题
下列哪个语句查出雇员表(employees)里的雇员名字(ename)是‘SMITH’的信息,并且给雇员名字(ename)列定义一个别名Name()。
A.select employeesno，ename Name，job from employees where ename=‘SMITH’B.select employeesno，ename ‘Name’，job from employees where ename=SMITHC.select employeesno，ename “Name”，job from employees where ename=‘SMITH’D.select employeesno，ename ‘Name’，job frome mployees wheree name=‘SMITH’
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以下语句不正确的是( )A.select * from emp;B.select ename,hiredate,sal from emp;C.select * from emp order deptno;D.select * from where deptno=1 and sal
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Examine the following commands and their output:SQL SELECT ename, sal FROM emp WHERE ename=‘JAMES‘; ENAME SAL JAMES 1050QL UPDATE emp SET sal=sal+sal*1.2 WHERE ename=‘JAMES‘;1 row updated.SQL SELECT ename, sal FROM emp WHERE ename=‘JAMES‘; ENAME SAL JAMES 2310View the exhibit and examine the Flashback Version Query that was executed after the preceding commands.What could be the possible cause for the query not displaying any row?（）A. Flashback logging is not enabled for the database.B. The changes made to the table are not committed.C. Supplemental logging is not enabled for the database.D. The database is not configured in ARCHIVELOG mode.
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You need to create a view EMP_VU. The view should allow the users to manipulate the records of only the employees that are working for departments 10 or 20. Which SQL statement would you use to create the view EMP_VU? （）A. CREATE VIEW emp_vu AS SELECT * FROM employees WHERE department _ id IN (10,20);B. CREATE VIEW emp_vu AS SELECT * FROM employees WHERE department_id IN (10,20) WITH READ ONLY;C. CREATE VIEW emp_vu AS SELECT * FROM employees WHERE department_id IN (10,20) WITH CHECK OPTION;D. CREATE FORCE VIEW emp_vu AS SELECT * FROM employees WITH department_id IN (10,20);E. CREATE FORCE VIEW emp_vu AS SELECT * FROM employees WHERE department_id IN (10,20) NO UPDATE;
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The EMP table has these columns:ENAME VARCHAR2(35)SALARY NUMBER(8,2)HIRE_DATE DATEManagement wants a list of names of employees who have been with the company for more than five years. Which SQL statement displays the required results? （）A. SELECT ENAME FROM EMP WHERE SYSDATE-HIRE_DATE 5;B. SELECT ENAME FROM EMP WHERE HIRE_DATE-SYSDATE 5;C. SELECT ENAME FROM EMP WHERE (SYSDATE_HIRE_DATE)/365 5;D. SELECT ENAME FROM EMP WHERE (SYSDATE_HIRE_DATE)*/365 5;
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对于第7题的两个基本表，有一个SQL语句： SELECT ENO, ENAME FROM EMP WHERE DNO NOT IN (SELECT DNO FROM DEPT WHERE DNAME='金工车间');其等价的关系代数表达式是：______。A．πENO,ENAME(σDNAME≠'金工车间'(EMPDEPT))B．πENO,ENAMEC．πENO,ENAME(EMP)-πENO,ENAME (σDNAME='金工车间'(EMPDEPT))D．πENO,ENAME (EMP)-πENO,ENAME (σDNAME≠'金工车间'(EMPDEPT))
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对于以下SQL语句说法正确的是()SELECT ename FROM empWHERE sal IN (SELECT MAX(sal)FROM emp GROUP BY deptno);
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下列哪个语句查出雇员表（employees）里的雇员名字（ename）是‘SMITH’的信息，并且给雇员名字（ename）列定义一个别名Name（）。A、select employeesno，ename Name，job from employees where ename=‘SMITH’B、select employeesno，ename ‘Name’，job from employees where ename=SMITHC、select employeesno，ename “Name”，job from employees where ename=‘SMITH’D、select employeesno，ename ‘Name’，job frome mployees wheree name=‘SMITH’
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在Oracle中，下面哪条语句当COMM字段为空时显示0，不为空时显示COMM的值（）。A、select ename,nvl（comm.,0）from empB、select ename,null（comm.,0）from empC、SELECT ename,NULLIF（comm,0）FROM empD、SELECT ename,DECODE（comm.,NULL,0）FROM emp
考题
Which SQL statement generates the alias Annual Salary for the calculated column SALARY*12?（）A、SELECT ename, salary*12 'Annual Salary' FROM employees;B、SELECT ename, salary*12 "Annual Salary" FROM employees;C、SELECT ename, salary*12 AS Annual Salary FROM employees;D、SELECT ename, salary*12 AS INITCAP("ANNUAL SALARY") FROM employees
考题
The EMPLOYEES table contains these columns: EMPLOYEE_ID NUMBER(4) ENAME VARCHAR2 (25) JOB_ID VARCHAR2(10) Which SQL statement will return the ENAME, length of the ENAME, and the numeric position of the letter "a" in the ENAME column, for those employees whose ENAME ends with a the letter "n"?（）A、SELECT ENAME, LENGTH(ENAME), INSTR(ENAME, 'a') FROM EMPLOYEES WHERE SUBSTR (ENAME, -1,1) = 'n';B、SELECT ENAME, LENGTH(ENAME), INSTR(ENAME, ,-1,1) FROM EMPLOYEES WHERE SUBSTR (ENAME, -1,1) = 'n';C、SELECT ENAME, LENGTH(ENAME), SUBSTR(ENAME, -1,1) FROM EMPLOYEES WHERE INSTR (ENAME, 1,1) = 'n';D、SELECT ENAME, LENGTH(ENAME), SUBSTR(ENAME, -1,1) FROM EMPLOYEES WHERE INSTR (ENAME, -1,1) = 'n';
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You need to display the last names of those employees who have the letter "A" as the second character in their names.Which SQL statement displays the required results?（）A、SELECT last_name FROM EMP WHERE last_ name LIKE '_A%';B、SELECT last_name FROM EMP WHERE last name ='*A%'C、SELECT last_name FROM EMP WHERE last name ='_A%';D、SELECT last_name FROM EMP WHERE last name LIKE '*A%'
考题
当你执行以下查询语句：SELECT employeesno，ename FROM employees WHERE employeesno=7782 OR employeesno=7876；在WHERE语句中，以下哪个操作符可以取代OR？（）A、INB、BETWEEN……andC、LIKED、=
考题
下面哪条语句可以取出薪水最高的前三个人：（）A、SELECT * FROM （SELECT * FROM EMPLOYEES ORDER BY SALARY ）；B、SELECT * FROM （SELECT * FROM EMPLOYEES ORDER BY SALARY ） WHERE ROWNUM=3；C、SELECT * FROM （SELECT * FROM EMPLOYEES ORDER BY SALARY DESC） WHERE ROWNUM=3；D、SELECT * FROM EMPLOYEES WHERE ROWNUM=3 ORDER BY SALARY DESC；
考题
查询出所有名字以’S’开始的员工（）A、select * from emp where ename in 'S%';B、select * from emp where ename='S%';C、select * from emp where ename like 'S%';D、select * from emp where ename like 'S_';
考题
User SCOTT executes the following command on the EMP table but has not issued COMMIT， ROLLBACK， or any data definition language （DDL） command： SQL SELECT ename FROM emp 2 WHERE job=’CLERK’ FOR UPDATE OF empno； SCOTT has opened another session to work with the database instance. Which three operations wouldwait when issued in SCOTT’s second session（）A、LOCK TABLE emp IN SHARE MODE；B、LOCK TABLE emp IN EXCLUSIVE MODE；C、UPDATE emp SET sal=sal*1.2 WHERE job=MANAGER；D、INSERT INTO emp（empno，ename） VALUES （1289，’Harry’）；E、SELECT ename FROM emp WHERE job=’CLERK’ FOR UPDATE OF empno；
考题
User SCOTT executes the following command on the EMP table but has not issued COMMIT， ROLLBACK， orany data definition language （DDL） command： SQL SELECT ename FROM emp WHERE job=’CLERK’ FOR UPDATE OF empno； SCOTT has opened another session to work with the database instance. Which three operations would waitwhen issued in SCOTT’s second session（）A、LOCK TABLE emp IN SHARE MODE；B、LOCK TABLE emp IN EXCLUSIVE MODE；C、UPDATE emp SET sal=sal*1.2 WHERE job=ANAGER？UPDATE emp SET sal=sal*1.2 WHERE job=？ANAGER？D、INSERT INTO emp（empno，ename） VALUES （1289，’Harry’）；E、SELECT ename FROM emp WHERE job=’CLERK’ FOR UPDATE OF empno
考题
The EMP table has these columns: ENAME VARCHAR2(35) SALARY NUMBER(8,2) HIRE_DATE DATE Management wants a list of names of employees who have been with the company for more than five years. Which SQL statement displays the required results?（）A、SELECT ENAME FROM EMP WHERE SYSDATE-HIRE_DATE 5;B、SELECT ENAME FROM EMP WHERE HIRE_DATE-SYSDATE 5;C、SELECT ENAME FROM EMP WHERE (SYSDATE_HIRE_DATE)/365 5;D、SELECT ENAME FROM EMP WHERE (SYSDATE_HIRE_DATE)*/365 5;
考题
限制从EMP表中只选出前5条记录的查语句为（）。A、SELECT TOP 5 * FROM EMPB、SELECT DISTINCT 5 * FROM EMPC、SELECT * FROM EMP WHERE ROWNUM6D、SELECT * FROM EMP WHERE ROWNUM=5
考题
单选题对于以下SQL语句说法正确的是（） SELECT ename FROM emp WHERE sal IN (SELECT MAX(sal) FROM emp GROUP BY deptno);A
这个语句是符合语法的B
这个语句是不能执行的,因为缺少HAVING子句C
这个语句是不能执行的,因为分组的条件列不在SELECT列表中D
这个语句是不能执行的,因为GROUP BY子句应该在主查询中,而不是在子查询中E
在主查询的WHERE条件中,不应该用IN,而应该用等号
考题
单选题The EMP table has these columns: ENAME VARCHAR2(35) SALARY NUMBER(8,2) HIRE_DATE DATE Management wants a list of names of employees who have been with the company for more than five years. Which SQL statement displays the required results? （）A
SELECT ENAME FROM EMP WHERE SYSDATE-HIRE_DATE 5;B
SELECT ENAME FROM EMP WHERE HIRE_DATE-SYSDATE 5;C
SELECT ENAME FROM EMP WHERE (SYSDATE_HIRE_DATE)/365 5;D
SELECT ENAME FROM EMP WHERE (SYSDATE_HIRE_DATE)*/365 5;
考题
单选题查询出所有名字以’S’开始的员工（）A
select * from emp where ename in 'S%';B
select * from emp where ename='S%';C
select * from emp where ename like 'S%';D
select * from emp where ename like 'S_';
考题
单选题下列哪个语句查出雇员表（employees）里的雇员名字（ename）是‘SMITH’的信息，并且给雇员名字（ename）列定义一个别名Name（）。A
select employeesno，ename Name，job from employees where ename=‘SMITH’B
select employeesno，ename ‘Name’，job from employees where ename=SMITHC
select employeesno，ename “Name”，job from employees where ename=‘SMITH’D
select employeesno，ename ‘Name’，job frome mployees wheree name=‘SMITH’
考题
单选题You need to create a view EMP_VU. The view should allow the users to manipulate the records of only the employees that are working for departments 10 or 20. Which SQL statement would you use to create the view EMP_VU? （）A
CREATE VIEW emp_vu AS SELECT * FROM employees WHERE department _ id IN (10,20);B
CREATE VIEW emp_vu AS SELECT * FROM employees WHERE department_id IN (10,20) WITH READ ONLY;C
CREATE VIEW emp_vu AS SELECT * FROM employees WHERE department_id IN (10,20) WITH CHECK OPTION;D
CREATE FORCE VIEW emp_vu AS SELECT * FROM employees WITH department_id IN (10,20);E
CREATE FORCE VIEW emp_vu AS SELECT * FROM employees WHERE department_id IN (10,20) NO UPDATE;
考题
单选题You need to create a view EMP_VU. The view should allow the users to manipulate the records of only the employees that are working for departments 10 or 20. Which SQL statement would you use to create the view EMP_VU?（）A
CREATE VIEW emp_vu AS SELECT * FROM employees WHERE department_id IN (10,20);B
CREATE VIEW emp_vu AS SELECT * FROM employees WHERE department_id IN (10,20) WITH READ ONLY;C
CREATE VIEW emp_vu AS SELECT * FROM employees WHERE department_id IN (10,20) WITH CHECK OPTION;D
CREATE FORCE VIEW emp_vu AS SELECT * FROM employees WHERE department_id IN (10,20);E
CREATE FORCE VIEW emp_vu AS SELECT * FROM employees WHERE department_id IN (10,20) NO UPDATE;
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