答案来历:熊猫奥鹏(www.188open.com)-[吉林大学]吉大《数据库应用技术》在线作业一
试卷总分:100 得分:100
第1题,Given the tables:
COUNTRY STAFF
id name person cities id name
1 Argentina 1 10 1 Aaron
2 Canada 2 20 2 Adams
3 Cuba 2 10 3 Jones
4 Germany 1 0
5 France 3 5
6 Italy 1 5
the report:
id name number_of_countries
---------- ---------- -------------------
1 Aaron 3
and the SQL statement:
SELECT B.id,B.name,COUNT(DISTINCT A.name) AS number_of_countries
FROM country A, staff B
WHERE B.id=A.person
GROUP BY B.id,B.name
HAVING COUNT(DISTINCT A.name):count_var
Which of the following values does :count_var require to print out the above
report?
A、1
B、2
C、3
D、4
正确答案:
第4题,Given an ODBC/CLI program with a single connection, two threads and the following actions which complete successfully:
Thread 1: INSERT INTO mytab VALUES (1)
Thread 2: INSERT INTO mytab VALUES (2)
Thread 1: COMMIT
Thread 2: INSERT INTO mytab VALUES (3)
Thread 1: ROLLBACK
Thread 2: COMMIT
How many records will be inserted and retained in the table MYTAB?
A、0
B、1
C、2
D、3
正确答案:
第8题,在句子CREATE VIEW EMP_VIEW2 (EMPNO, EMPNAME, DEPTNO, JOBTITLE, HIREDATE) AS SELECT ID, NAME, DEPT, JOB, HIREDATE FROM EMPLOYEE WHERE DEPT=10 WITH CHECK OPTION; 所界说的视图中,当运用INSERT句子时,若新增的行中DEPTNO数值不为10,则该即将被回绝刺进。
A、正确
B、错误
正确答案:
第9题,若用如下的SQL句子创立一个student表:
CREATE TABLE student(NO CHAR(4) NOT NULL,NAME CHAR(8) NOT NULL,SEX CHAR(2),AGE NUMBERIC(2))
能够刺进到student表中的是哪一项?
A、(\'1031\',\'曾华\',男,23)
B、(\'1031\',\'曾华\',NULL,NULL)
C、(NULL,\'曾华\',\'男\',\'23\')
D、(\'1031\',NULL,\'男\',23)
正确答案:
答案来历:熊猫奥鹏(www.188open.com),Given the following table:
CREATE TABLE employee
(name CHAR(10), salary DEC NOT NULL WITH DEFAULT)
INSERT INTO employee (name, salary) VALUES (\'SMITH\', 30000)
INSERT INTO employee (name) VALUES (\'JONES\')
INSERT INTO employee (name, salary) VALUES (\'ALI\', 35000)
Which of the following statements will retrieve more than one row?
A、SELECT salary FROM employee WHERE salary IN (SELECT (salary/(SELECT
SUM(salary) FROM employee)) FROM employee)
B、SELECT COALESCE(AVG(salary)) FROM employee
C、SELECT SUM(salary)/COUNT(*) FROM employee
D、SELECT salary/(SELECT SUM(salary) FROM employee) FROM employee
正确答案:
第18题,Given the expression:
WITH most_cities AS
(
SELECT b.id,b.name,a.cities
FROM country a, staff b
WHERE a.person = b.id AND
cities:threshold
)
SELECT * FROM most_cities
In which of the following does MOST_CITIES exist?
A、user tables
B、server memory
C、user table space
D、system catalog tables
正确答案:
答案来历:熊猫奥鹏(www.188open.com),Under which of the following situations must dynamic SQL be used?
A、When temporary table references exist at compile time
B、When the host variables\' values are unknown at compile time
C、When the columns in the SELECT clause are unknown at compile time
D、When the number of rows being returned are unknown at compile time
正确答案:
第21题,How many rows can be retrieved using a single SELECT INTO statement?
A、Only one row
B、As many as are in the result
C、As many as are host variables used in the call
D、As many as host variable array structures can hold
正确答案:
答案来历:熊猫奥鹏(www.188open.com),Given the EMPLOYEE table definition:
CREATE TABLE employee (
workdept CHAR(30),
salary INTEGER
)
Which of the following is a correct usage of parameter markers in a JDBC
program?
A、String sql =
"UPDATE employee SET salary=salary*?WHERE workdept=?";
statement stmt=con.createStatement(sql);
B、String sql =
"UPDATE employee SET salary=salary*?WHERE workdept=?";
statement stmt=con.createStatement(sql);
C、String sql =
"UPDATE employee SET salary=salary*?WHERE workdept=?";
statement stmt=con.createStatement(sql);
D、String sql =
"UPDATE employee SET salary=salary*?WHERE workdept=?";
statement stmt=con.createStatement(sql);
正确答案:
试卷总分:100 得分:100
第1题,Given the tables:
COUNTRY STAFF
id name person cities id name
1 Argentina 1 10 1 Aaron
2 Canada 2 20 2 Adams
3 Cuba 2 10 3 Jones
4 Germany 1 0
5 France 3 5
6 Italy 1 5
the report:
id name number_of_countries
---------- ---------- -------------------
1 Aaron 3
and the SQL statement:
SELECT B.id,B.name,COUNT(DISTINCT A.name) AS number_of_countries
FROM country A, staff B
WHERE B.id=A.person
GROUP BY B.id,B.name
HAVING COUNT(DISTINCT A.name):count_var
Which of the following values does :count_var require to print out the above
report?
A、1
B、2
C、3
D、4
正确答案:
第2题,两个子查询的成果(),能够履行并、交、差操作
A、结构彻底共同
B、结构彻底纷歧致
C、结构有些共同
D、主键共同
正确答案:
第3题,关于撑持小规划的部门级应用,这些应用不需求存取驻留在OS/400、OS/390等渠道上的远程数据库,则需求哪种等级的DB2 商品?
A、企业版
B、工作组版
C、企业拓展版
D、个人版
E、卫星版
F、微型版
正确答案:
第4题,Given an ODBC/CLI program with a single connection, two threads and the following actions which complete successfully:
Thread 1: INSERT INTO mytab VALUES (1)
Thread 2: INSERT INTO mytab VALUES (2)
Thread 1: COMMIT
Thread 2: INSERT INTO mytab VALUES (3)
Thread 1: ROLLBACK
Thread 2: COMMIT
How many records will be inserted and retained in the table MYTAB?
A、0
B、1
C、2
D、3
正确答案:
答案来历:熊猫奥鹏(www.188open.com),在数据库中存储的是:()
A、数据
B、数据模型
C、数据以及数据之间的联系
D、信息
正确答案:
第6题,运用DROP句子吊销根本表时,运用以下哪个子句,能够将部属的视图和束缚引证悉数吊销?
A、NULL
B、RESTRICT
C、CASCADE
D、DISTINCT
正确答案:
第7题,关系形式中各级形式之间的关系为()
A、3NF包括 2NF包括 1NF
B、3NF包括 1NF包括 2NF
C、1NF 包括2NF包括 3NF
D、2NF包括 1NF 包括3NF
正确答案:
第8题,在句子CREATE VIEW EMP_VIEW2 (EMPNO, EMPNAME, DEPTNO, JOBTITLE, HIREDATE) AS SELECT ID, NAME, DEPT, JOB, HIREDATE FROM EMPLOYEE WHERE DEPT=10 WITH CHECK OPTION; 所界说的视图中,当运用INSERT句子时,若新增的行中DEPTNO数值不为10,则该即将被回绝刺进。
A、正确
B、错误
正确答案:
第9题,若用如下的SQL句子创立一个student表:
CREATE TABLE student(NO CHAR(4) NOT NULL,NAME CHAR(8) NOT NULL,SEX CHAR(2),AGE NUMBERIC(2))
能够刺进到student表中的是哪一项?
A、(\'1031\',\'曾华\',男,23)
B、(\'1031\',\'曾华\',NULL,NULL)
C、(NULL,\'曾华\',\'男\',\'23\')
D、(\'1031\',NULL,\'男\',23)
正确答案:
答案来历:熊猫奥鹏(www.188open.com),Given the following table:
CREATE TABLE employee
(name CHAR(10), salary DEC NOT NULL WITH DEFAULT)
INSERT INTO employee (name, salary) VALUES (\'SMITH\', 30000)
INSERT INTO employee (name) VALUES (\'JONES\')
INSERT INTO employee (name, salary) VALUES (\'ALI\', 35000)
Which of the following statements will retrieve more than one row?
A、SELECT salary FROM employee WHERE salary IN (SELECT (salary/(SELECT
SUM(salary) FROM employee)) FROM employee)
B、SELECT COALESCE(AVG(salary)) FROM employee
C、SELECT SUM(salary)/COUNT(*) FROM employee
D、SELECT salary/(SELECT SUM(salary) FROM employee) FROM employee
正确答案:
第11题,并发操控的首要方法是选用以下哪种机制?
A、口令
B、锁
C、副本
D、检查点
正确答案:
答案来历:熊猫奥鹏(www.188open.com),E-R图中的联系能够与()实体有关
A、0个
B、1个
C、1个或多个
D、多个
正确答案:
第13题,下述关于数据库系统的正确叙说是()
A、数据库中只存在数据项之间的联系
B、数据库的数据项之间和记载之间都存在联系
C、数据库的数据项之间无联系,记载之间存在联系
D、数据库的数据项之间和记载之间都不存在联系
正确答案:
第14题,界说根本表时,若要求某一列的值不能为空,则应在界说时运用啥保存字?但假如该列是主键,则可省写。
A、NULL
B、NOT NULL
C、DISTINCT
D、UNIQUE
正确答案:
答案来历:熊猫奥鹏(www.188open.com),SQL语言具有()功用。
A、关系标准化、数据操作、数据操控
B、数据界说、数据操作、数据操控
C、数据界说、关系标准化、数据操控
D、数据界说、关系标准化、数据操作
正确答案:
第16题,创立一个DMS类型的表空间,能够运用以下哪两种文件系统对象作为容器?
A、目录
B、文件
C、DEVICE
正确答案:
第17题,发人员开发拜访后台AIX上的DB2的windows程序,需求在windows开发渠道上装置:
A、DB2运转时刻客户端
B、DB2管理客户端
C、DB2应用程序开发客户端
D、DB2瘦客户端
正确答案:
第18题,Given the expression:
WITH most_cities AS
(
SELECT b.id,b.name,a.cities
FROM country a, staff b
WHERE a.person = b.id AND
cities:threshold
)
SELECT * FROM most_cities
In which of the following does MOST_CITIES exist?
A、user tables
B、server memory
C、user table space
D、system catalog tables
正确答案:
第19题,下列哪种东西能够向表中增加记载,并更改数据库的统计信息?
A、import
B、insert
C、load
D、update
正确答案:
答案来历:熊猫奥鹏(www.188open.com),Under which of the following situations must dynamic SQL be used?
A、When temporary table references exist at compile time
B、When the host variables\' values are unknown at compile time
C、When the columns in the SELECT clause are unknown at compile time
D、When the number of rows being returned are unknown at compile time
正确答案:
第21题,How many rows can be retrieved using a single SELECT INTO statement?
A、Only one row
B、As many as are in the result
C、As many as are host variables used in the call
D、As many as host variable array structures can hold
正确答案:
第22题,下面哪个东西能够保留终端用户需求存取的元数据?
A、Query Management Facility
B、DB2 Query Patroller
C、DB2存储过程构建器
D、信息目录
正确答案:
第23题,要更改数据库管理器装备文件,需以下哪个数据库权限?
A、DBADM
B、SYSMAINT
C、SYSCTRL
D、SYSADM
正确答案:
第24题,下列那种阻隔级关于只读操作不在数据行上加锁?
A、RR
B、RS
C、CS
D、UR
正确答案:
答案来历:熊猫奥鹏(www.188open.com),Given the EMPLOYEE table definition:
CREATE TABLE employee (
workdept CHAR(30),
salary INTEGER
)
Which of the following is a correct usage of parameter markers in a JDBC
program?
A、String sql =
"UPDATE employee SET salary=salary*?WHERE workdept=?";
statement stmt=con.createStatement(sql);
B、String sql =
"UPDATE employee SET salary=salary*?WHERE workdept=?";
statement stmt=con.createStatement(sql);
C、String sql =
"UPDATE employee SET salary=salary*?WHERE workdept=?";
statement stmt=con.createStatement(sql);
D、String sql =
"UPDATE employee SET salary=salary*?WHERE workdept=?";
statement stmt=con.createStatement(sql);
正确答案:
专业辅导各院校在线、离线考核、形考、终极考核、统考、社会调查报告、毕业论文写作交流等!(非免费)
联系我们:QQ客服:3326650399 439328128 微信客服①:cs80188 微信客服②:cs80189
扫一扫添加我为好友 扫一扫添加我为好友