2017年Oracle数据库基础测试答案

1、2017年Oracle数据库基础测试答案姓名成绩、单项选择题（每题 1分，共60分）1 .列出EMP1中，从事每个工种(JOB)的员工人数A.selectjob from emp;B. selectjob,count(*) from emp;C. select distinctjob,count(*) from emp;D. selectjob,count(*) from emp group by job;2 .查询EMP!中的数据并且显示出行号(从1开始)A.select rowid,a.* from emp a;B. select level,a.* from emp a;C. selec

2、t rownum,a.* from emp a;D. select sequence,a.* from emp a;3 . Oracle数据库中发出一个查询。下列哪个选项不能查询对用户定义静态表 达式执行数学运算时的查询组件？A.列子句 B .表子句 C . DUALD. where子句4 .你要操纵Oracle数据，下列哪个不是SQL命令？A. select * from dual;B. set defineC. update emp set ename = 6543 where ename = SMITHERS ;D. create table employees(empid varcha

3、r2(10) primary key);5 .你要在Oracle中定义SQL查询。下列哪个数据库对象不能直接从select语句中引用？A.表 B .序列C.索引 D .视图6 .你要根据PRODUCT_NAME PROFITS查询中过滤返回的数据。下列哪个 子句包含相应过滤条用的引用？A. select B . fromC. where D . having7 .下列代码显示了 PROFITS输出的局部：PRODUCT_NAMmRODUCT_TYPTR_END_DATEPROFIT 下列查询的where子句哪个能正确计算2001年1月1日至U 6月1日六个月 内销售的所有家电总利润？BARNE

4、Y DOLL TOYGAS GRILLAPPPENCILOFFICE31-MAR-200131-MAR-200130-JUN-20016575430.301234023.8834039.99A.where product_name =GAS GRILL and qtr_end_datebetween 01-JAN-2001 and 01-JUN-2001;B. where proeuct_type =APPLIANCE and name = GAS GRILL andqtr_end_date= 31-JAN-2001 or 30-JUN-2001;C.where proeuct_type =A

5、PPLIANCE and qtr_end_datebetween 01-JAN-2001 and 01-JUN-2001;D.where proeuct_name =GAS GRILL and qtr_end_date=01-JAN-2001 or 01-JUN-2001;用下列代码所示的内容回答后面八个问题：EMPNOENAMEDEPTNOJOBMGRHIREDATESALCOMM7369SIMTHCLERK790217-DEC-80800207499ALLENSALESMAN769820-FEB-811600300307521WARDSALESMAN769822-FEB-811250500

6、307566JONESMANAGER783902-APR-812975207654MARTINSALESMAN769828-SEP-8112501400307698BLAKEMANAGER783901-MAY-812850307782CLARKMANAGER783909-JUN-812450107788SCOTTANALYST756619-APR-873000207839KINGPRESIDENT17-NOV-815000107844TURNERSALESMAN769808-SET-8115000307876ADAMSCLERK778823-MAY-871100207900JAMESCLERK

7、768903-DEC-81950307902FORDANALYST756603-DEC-813000207934MILLERCLERK778223-JAN-821300108 .以下选项中哪个是下列查询返回的值：select sum(sal) + sum(comm) fromemp where job =ANALYST or ename likeJ% ?A. 6000 B . 9925 C . 9975 D. NULL9 .以下选项中哪个是下列查询返回的值：select count(mgr) from emp wheredeptno = 10 ?A. 1B, 2 C . 3 D . NULL1

8、0 .以下选项中哪个是下列查询返回的值：select count(*) from emp where mgr = 7700-2 ?A. 5 B . 6 C .7 D . NUL11 .以下选项中哪个是下列SQL#令产生的第三个员工：select ename, sal fromemp where job= SALESMA N order by empno desc ?A. ALLEN B. MARTIN C. TURNER D. WARD12 .以下选项中哪个是下列 SQL命令产生的第三个员工：ename, sal from emp where job= SALESMA N order by 1

9、 desc ?A. ALLEN B. MARTIN C . TURNER D WARD13 .以下选项中哪个是发出下列查询后 Oracle返回的值：select substr(job, 1, 3) from empwhere enamelike upper( _ar%)A. ANA B . CLE C . MAN D . SAL14 .以下选项中哪个是发出下列查询后 Oracle返回的值：selecttrunk(months_between(min(hiredate), max(hiredate) from emp ? A. 24 B . 25C. -24 D . -2515 .以下选项中哪个

10、是发出下列查询后 Oracle返回的值：select * from emp where hiredate 23-JAN-82 ?(选择两个答案)A. ADAMS B . MILLERC. SCOTT D . SMITH16 .TEST表包含两个歹U, TESTCOL义为数据类型 NUMBER(10)TESTCOL_定义 为数据类型VARCHAR2(10)在Oracle中发出下列语句：insert into test(testcol, testcol_2) values (null, FRANCIS ),然后对表进程下列查询：select nvl(testcol,EMPTY) as testco

11、l from test wheretestcol_2 = FRANCIS。下列选项哪个是得到的结果？A. Oracle 返W果 0B . Oracle 返W果 EMPTYC. Oracle返回名果NULLD. Oracle返回错误结果17.要从ORDERS中取得数据，其中包括三个歹U CUSTOMERORDER_DATE ORDER_AMTT以用下列哪个where子句查询ORDERS,取得客户LESLIE 超过2700的订单？A. where customer =B. where customer =LESLIE;LESLIE and order_amt 2700;D. where custo

12、mer = LESLIE and order_amt 2700;18 .查询出当前的数据库系统时间，精确到秒A. select to_date(sysdate,YYYY-MM-DD HH24:MI:SS) from dual;B. select to_char(sysdate,YYYY-MM-DD HH24:MI:SS) from dual;C. select date(sysdate,YYYY-MM-DD HH24:MI:SS) from dual;D. select chr(sysdate,YYYY-MM-DD HH24:MI:SS) from dual;19 .用下列代码块回答问题：SQ

13、L select(-45) as output from dual; OUTPUT-45下列哪个单行函数无法产生这个输出？A. abs() B . ceil() C . floor() D . round()20 .对表中的某一行，VARCHAR2包含数值SMITHY应用程序在右侧填充七个 空格。length()函数处理这个列值时，返回什么值？A. 6B. 13 C .30 D . 6021 .在Oracle中发出的下列查询：SQLselect months_between( 15-MAR-83 , 15-MAR-97 ) form dual; Oracle返回什么？A. 14 B . -14

14、 C . 168 D. -16822 .你要在Oracle中使用日期信息的格式掩码。下列哪种情形不适合这个格式 掩码？.to_char()D. to_number()A. to_date()BC. alter session set nls_date_format23 .数据库中有两表 PRODUCT STORAGE_BOX中歹U出各个产品的惟一 ID号、 产品名和特定产品所在的箱子。另一个表列出各个存储箱(用数字标识) 可以包含许多产品，但每个箱子只能在一个地方。下列哪个语句能正确显示 这个数据库中所有产品ID、名称和箱子地址？A. select d_id, d_name

15、, b.box_loc from product p, storage_box b d_id = d_id and prod_name= WIDGET ;B. select d_id, d_name, b.box_loc from product p, storage_box b whereprod_name- WIDGET ;C. select d_id, d_name, b.box_loc from product p, storage_box b wherep.stor_box_num = b.stor_box_num

16、 and prod_name= WIDGET ;D. select prod_id, prod_name, box_loc from product , storage_box where stor_box_num = stor_box_num and prod_name= WIDGET ;24 .开发报会时，要连接三个表面S息，这些表方 EMP DEPlt SALGRADEH 需要公司10级以上员工相应的员工、部门地址与工资范围的记录。这个查 询需要多少比较运算？A. 2B. 3 C . 4D . 525 .要连接两个表PRODUSTSTOTAGE内容，列出所有包含产品的箱子地址。 PROD

17、UCT三歹U ID、 NAMEf BOX# STORAGE两歹U BOX#! LOC 下列哪个 选项无法得到想要的结果？A. select product.id, , storage.loc from product, storage where product.box#=storage.box#;B. select product.id, , storage.loc from product join storage on product.box#=storage.box#;C. selectproduct.id,,st

18、orage.locfrom product naturaloin storage on product.box#=storage.box#;D. selectproduct.id,,storage.locfrom product naturaljoin storage;26 .数据库中有两个表 PRODUCT STORAGE_B,OX中列J出各个产品的惟一 ID 号、产品名和特定产品所在的箱子。另一个表中列出各个存储箱(用数字标 识)可以包含许多产品，但每个箱子只能在一个地方。下列哪个语句能正确 显示这个数据库中所有产品ID、名称和箱子地址，不管有没有指定存储箱？ A.

19、 select d_id, d_name, b.box_loc from product p left outer join storage_box b onp.stor_bax_num = b. stor_bax_num where prod_name= WIDGET (+); B. select d_id, d_name, b.box_loc from product p left outer join storage_box b onp.stor_bax_num = b. stor_bax_num where prod_name= WIDGET ;

20、 C. select d_id, d_name, b.box_loc from product p right outer join storage_box bwhere b.stor_bax_num = p. stor_bax_num(+) and prod_name- WIDGET (+);D. select d_id, d_name, b.box_loc from product p full outer join storage_box b onp.stor_bax_num = b. stor_bax_num where b.stor_box_n

21、um is NULL ;27 .列出薪水高于所在部门平均工资的员工信息A.select deptno,ename,sal from emp a where sal(select avg(a.sal) from emp where deptno=a.deptno);B. select deptno,ename,sal from empa where sal(select avg(sal) from emp where deptno=a.deptno);C.select a.deptno,a.ename,a.sal from emp a,emp b where a.deptno=b.deptno

22、and a.salavg(b.sal);D. select a.deptno,a.ename,a.sal from emp a,emp b where a.deptno=b.deptno and b.salavg(a.sal);28 .要查询PROFITS存储公司不同地区、产品类型和季度的利润信息。下列哪 个SQL语句显示不同地区、产品类型和季度的利润的交叉表输出？A. select region, product_type, time,sum(profit) from profits group by region, prod_type, time;B. select region, pro

23、duct_type, time from profits group by rollup(region, prod_type, time);C. select region, product_type, time, from profits group by cube(region, prod_type, time);D. select region, product_type, time,sum(profit) from profits groupby cube(region, prod_type, time);29 .对数据库运行下列哪个group by查询时不会从Oracle产生错误？A

24、. select deptno, job, sum(sal) from emp group by job, deptno;B. select sum(sal), deptno, job from emp group by job, deptno;C. select deptno, job, sum(sal) from emp;D. select deptno, sum(sal), job from emp group by job, deptno;30 .检查下列SQL勺输出SQL select a.deptno,a.job,b.loc,sum(a.sal)2 from dmp a,dept

25、b3 where a.deptno = b.depton4 group by a.deptno,a.job,b.loc5 order by sum(a.sal);这个查询按哪个列的顺序返回输出？A. A.DEPTON B. A.JOB C . B.LOCD. SUM(A.SAL)31 .要查询的PROFITSg存储公司不同地区、产品类型和季度的利润信息。下列 哪个SQL句按不同地区、产品类型和季度求出平均利润大于100000美元的利润？A. selectregion,prod_type,period,avg(profits)from profitswhereavg(prodit) 100000

26、 group by region, prod_type, period;B. selectregion,prod_type,period,avg(profits)from profitswhereavg(prodit) 100000 order by region, prod_type, period;C. selectregion,prod_type,period,avg(profits)from profitsgroupby region, prod_type, period having avg(prodit) 100000;D. selectregion,prod_type,perio

27、d,avg(profits)from profitsgroupby region, prod_type, period having avg(prodit) 100000;32 .公司的员工费用应用程序有两表，一个是EMP包含所有员工数据，一个是EXPENSE包含公司每个员工提交的费用票据。下列哪个查询取得提交的费 用总和超过其工资值的员工ID与姓名？A. select e.empno, e.ename from emp e where e.sal (select sum(x.vouch_amt) from expense x) and x.empno = e.empno;B. select

28、e.empno, e.ename from empe where e.sal (select x.vouch_amt from expense x where x.empno = e.empno);C. select e.empno, e.ename from emp e where e.sal select ename2 from emp3 where empno in4 ( select empno5 from expense6 where vouch_amt 10000 );下列哪个SQL句产生与上面相同的输出，改写成使用运算符？A. select e.ename from empe w

29、here exists(select x.empno from expense x where x.vouch_amt10000)and x.empno = e.empno;B. select e.ename from empe where exists(select x.empno from expense x where x.vouch_amt10000 and x.empno = e.empno);C. select e.ename from empe where x.empno = e.empnoand exists(select x.empno from expense xwhere

30、 x.vouch_amt10000)D. select e.ename from emp e, expense x where x.empno = e.empno and x.vouch_amt10000 andexists(select x.empno from expense x where)34.用下列代码块回答问题：SQL select deptno,job,avg(sal)2 from emp3 group by deptno,job4 having avg(sal)5 ( select sal6 from emp7 where ename =MARTIN );上述语句使用下面哪种子

31、查询？A.单行子查询B .多行子查询 C . from子句子查询 D .多列子查询35 .公司销售数据库有两个表，PROFIT行储不同地区不同季度的产品销售利润，REGION旃储每个部门地区名称、该地区总部地址和该地区副总裁姓名。下列哪个查询取得SMITHERS FUJIMORI与LIKKARAJU导的地区的玩具销 售禾I润？A. select sum(profit) from profits where region in (select region froms where reg_head in(SMITHERS,FUJMORI ,LAKKARAJU) and product=TOYS

32、;B. select sum(profit) from profits where region in (select region froms where reg_head in(SMITHERS,FUJMORI ,LAKKARAJU) and product=TOYS );C. select sum(profit) from profits where region = (select region fromswhere reg_head in(SMITHERS,FUJMORI ,LAKKARAJU) and product=TOYS ;D. select sum(profit) from

33、 profits where region in (select region froms where reg_head in(SMITHERS,FUJMORI ,LAKKARAJU) and product=TOYS ;36 .查询出EM俵中COMMP段为空的记录()A. select * from emp where comm=;B. select * from emp where comm=null;C. select * from emp where nvl(comm)=0;D. select * from emp where comm is null;37 .用下列代码块回答问题：S

34、QL select e.deptno,e.ename,e.job,e.sal2 from emp e3 where e.sal =4 ( select max(e2.sal)5 fromemp e26* where nvl(e.deptno,99) = nvl(de.deptno,99);DEPTNOENAMEJOBSAL30BLAKEMANAGER285010CLARKMANAGER245020SCOTTKINGANALYSTPRESIDENT3000500020FORDANALYST3000要在上述返回集的DEPTNOW显示99,可以用下列哪个SQL语句？A. select nvl(e.d

35、eptno,99), e.ename, e.sal from empe where (e.deptno, e.sal) = (select max(e2.sal) from emp e2 where nvl(e.dept, 99)= nvl(e2.deptno, 99);B. select nvl(e.deptno,99), e.ename, e.sal from emp e where e.sal = (select max(e2.sal) from empe2 where nvl(e.dept, 99) = nvl(e2.deptno, 99);C. select nvl(e.deptno

36、,99), e.ename, e.sal from empe where (e.deptno, e.sal) = (select e2.deptno, max(e2.sal) from empe2 where nvl(e.dept, 99) = nvl(e2.deptno, 99);D. select nvl(e.deptno,99), e.ename, e.sal from empe where (e.deptno, e.sal) = (select e2.deptno,max(e2.sal) from empe2 where nvl(e.dept, 99) = nvl(e2.deptno,

37、 99) group by el.deptno);38 .公司销售数据库包含一个PROFITS,按产品名、销售地区和季度列出利润 信息。如果要取得公司五个最畅销产品清单，可以用下列哪个SQL语句：A. select d_name, fitfrom (select prod_name, profit fromprofits order by profit desc) where rownum = 5;B. select d_name, fitfrom (select prod_name, sum(profit)from profits group by p

38、rod_name order by sum(profit) desc) subq where d_name = d_name;C. select d_name, fit from (select prod name, sum(profit) from profits group by prod_nameorder by sum(profit) desc) where rownum = 5;D. select d_name, fit from (select prod_name, sum(profit) from profits

39、order by sum(profit) desc) where rownum select profit from from profits where prod type = TOY and time period =&v_period ;D. accept v_period select profit from from profits where prod_type = TOY and time_period =&v_period ;40 .查询出EMPfe中1982年及以后入职的员工信息(注：字段hiredate为入职日 期，数据类型为DATE1A. select * from em

40、p where hiredate=19820101;B. select * from empwhere hiredate=to_char(19820101,YYYYMMDD); C.select * from empwhere to_date(hiredate,YYYYMMDD)=19820101; D. select * from empwhere to_char(hiredate,YYYYMMDD)=19820101;41.Oracle中要生成数据库表，下列哪个选项是无效表生成的语句？A. create table cats(c_name varchar2(10), c_weight nu

41、mber, c_owner varchar2(10);B. create table my_cats as select * from cats where owner =ME ;C. create global temporary table temp_cats(c_name varchar2(10), c_weight number, c_owner varchar2(10);D. create table cats over 5 lbs as select c name, c weight from cats where c_weight 5;42.试图在Oracle生成表时遇到下列错误

42、：ORA-00955-names already used by existing object 。下列哪个选项无法纠正这个错误？A.以不同的用户身份生成对象。B .删除现有同名对象C.改变生成对象中的列名。D .更名现有同名对象。43.SALES表中的PROFIT/U声明为NUMBER(10, 2下列哪个值无法在这个列 中存储？A. 5392845.324B. 871039453.1C. 75439289.34 D . 60079829.2544.员工KING于1981年11月17日聘用，你对Oracle数据库发出下列查询： select vsize(hiredate) from emp w

43、here ename = KING 。下歹!J哪个选项是返回的值？A. 4B. 7 C . 9D .1745.SALES表中将PRODUCT_NAM定义为CHAR(40后面要在表中增加一行， PRODUCT_NAME CAT_TOYS然后发出下歹U命令：select vsize(product_name) from sales 。下歹!J哪个选项是返回 的值？A. 8B. 12C. 40 D . 400046 .要把非 NULL NUMBER(10)变成 NUMBER(6)。发出适当 alter table 命令 之后必须完成下列哪些步骤？A.将列记录复制到临时存储地址。B .将所有行的NUM

44、BER设置为NULLC.对NUMBER据生成临时地址。D,将列记录从临时地址复制加主表中。47 .发出下歹！J语句： alter table sales drop columm profit;何时从 Oracle中实际删除列？A执行语句后立即删除。B.发出 alter table drop unused columns 命令之后C.发出 alter table set unused columns 命令之后D.发出alter table modify命令之后48 .要把SALE族中的PRODUCT_TYPE勺大小从 VARCHAR5)歹时曾力口至U VARCHAR2(10)用下列哪个语焉?A.

45、 alter table sales add(product_type varchar2(10);B. alter table sales modify product_type varchar2(10);C. alter table sales unused column product_type varchar2(10);D. alter table sales drop column product_type;49 .数据库中的PROFITS中PRODUCT_NAM田ALE_PERIOD建立主键。下列 哪个语句无法定义这个主键？A. create table profits(produc

46、t_name varchar2(10), sale_perion varchar2(10), profit number, constraint pk_profits_01 primary key (product_name, sale_period);B. alter table profits add constraint pk_profits_01 primary key(product_name, sale_period) deferrable initially immediate;C. alter table profits add(constraint pk_profits_01

47、 primary key(product_name, sale_period);D. create table profits(product_name varchar2(10) primary key, sale_period varchar2(10) Primary key, profit number)50 .列出JONES的所有下属员工，但不包括JONES本人A. select ename from emp connect by prior empno=mgr start with ename=JONES;B. select ename from emp where enameJONE

48、S connect by prior empno=mgr start with ename=JONES;C.select ename from emp where ename=JONES connect by prior empno=mgr start with ename=JONES;D. select ename from emp where ename=JONES connect by prior empno=mgr start with enameJONES;51 .以下关于数据库文件的说法正确的是()A、数据库是由数据文件构成的，其它文件是辅助文件B、数据库中的表，索引以及日志信息都

49、是以数据的形式存储在数据文件中 的G在线重做日志文件与归档日志文件的区别是：前者在内存，后者在外存上D 数据块的大小一旦确定，就不能更改了，除非重新设定数据库52 .你要关闭SALESft中UNIT_PRIC例的非NUL必束。下列哪个语句能完成这 个操作？A. alter table sales modify(unit_prices null);B. alter table sales modify(unit_prices not null);C. alter table sales add(unit_prices null);D. alter table sales add(unit_pri

50、ces not null);53、以下()内存区不属于SGAA. PGAB.日志缓冲区C.数据缓冲区D.共享池54、()模式存储数据库中数据字典的表和视图。A. DBA B . SCOTT C . SYSTEM D. SYS55、锁用于提供()。A.改进的性能B.数据的完整性和一致性C,可用性和易于维护D.用户安全56、以下哪种备份方式需要在完全关闭数据库进行（）。A.无归档日志模式下的数据库备份B.归档日志模式下的数据库备份C.使用导出实用程序进行逻辑备份D.以上都不对57.下面列举的是一些后台进程的功能：1：在数据文件头部记录检查点信息.2:在实例启动时执行恢复3:清理无用的临时段4:当用户进程失败时清理其资源.5:动态注册数据库服务到监听.6:监控