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You need to design a student registration database that contains several tables storing academic information. The STUDENTS table stores information about a student. The STUDENT_GRADES table stores information about the student's grades. Both of the tables have a column named STUDENT_ID. The STUDENT_ID column in the STUDENTS table is a primary key. You need to create a foreign key on the STUDENT_ID column of the STUDENT_GRADES table that points to the STUDENT_ID column of the STUDENTS table. Which statement creates the foreign key?（）
- A、CREATE TABLE student_grades (student_id NUMBER(12),semester_end DATE, gpa NUMBER(4,3), CONSTRAINT student_id_fk REFERENCES (student_id) FOREIGN KEY student (student_id));
- B、CREATE TABLE student_grades(student_id NUMBER(12),semester_end DATE, gpa NUMBER(4,3), student_id_fk FOREIGN KEY (student_id) REFERENCES students (student_id));
- C、CREATE TABLE student_grades(student_id NUMBER(12),semester_end DATE, gpa NUMBER(4,3), CONSTRAINT FOREIGN KEY (student_id) REFERENCES student (student_id));
- D、CREATE TABLE student_grades(student_id NUMBER(12),semester_end DATE, gpa NUMBER(4,3), CONSTRAINT student_id_fk FOREIGN KEY (student_id) REFERENCES students (student_id));
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更多 “ You need to design a student registration database that contains several tables storing academic information. The STUDENTS table stores information about a student. The STUDENT_GRADES table stores information about the student's grades. Both of the tables have a column named STUDENT_ID. The STUDENT_ID column in the STUDENTS table is a primary key. You need to create a foreign key on the STUDENT_ID column of the STUDENT_GRADES table that points to the STUDENT_ID column of the STUDENTS table. Which statement creates the foreign key?（）A、CREATE TABLE student_grades (student_id NUMBER(12),semester_end DATE, gpa NUMBER(4,3), CONSTRAINT student_id_fk REFERENCES (student_id) FOREIGN KEY student (student_id));B、CREATE TABLE student_grades(student_id NUMBER(12),semester_end DATE, gpa NUMBER(4,3), student_id_fk FOREIGN KEY (student_id) REFERENCES students (student_id));C、CREATE TABLE student_grades(student_id NUMBER(12),semester_end DATE, gpa NUMBER(4,3), CONSTRAINT FOREIGN KEY (student_id) REFERENCES student (student_id));D、CREATE TABLE student_grades(student_id NUMBER(12),semester_end DATE, gpa NUMBER(4,3), CONSTRAINT student_id_fk FOREIGN KEY (student_id) REFERENCES students (student_id));” 相关考题
考题
You need to design a student registration database that contains several tables storing academic information.The STUDENTS table stores information about a student. The STUDENT_GRADES table storesinformation about the student‘s grades. Both of the tables have a column named STUDENT_ID. The STUDENT_ID column in the STUDENTS table is a primary key.You need to create a foreign key on the STUDENT_ID column of the STUDENT_GRADES table thatpoints to the STUDENT_ID column of the STUDENTS table. Which statement creates the foreign key?（）A. CREATE TABLE student_grades (student_id NUMBER(12),semester_end DATE, gpa NUMBER(4,3), CONSTRAINT student_id_fk REFERENCES (student_id) FOREIGN KEY student (student_id));B. CREATE TABLE student_grades(student_id NUMBER(12),semester_end DATE, gpa NUMBER(4,3), student_id_fk FOREIGN KEY (student_id) REFERENCES students (student_id));C. CREATE TABLE student_grades(student_id NUMBER(12),semester_end DATE, gpa NUMBER(4,3), CONSTRAINT FOREIGN KEY (student_id) REFERENCES student (student_id));D. CREATE TABLE student_grades(student_id NUMBER(12),semester_end DATE, gpa NUMBER(4,3), CONSTRAINT student_id_fk FOREIGN KEY (student_id) REFERENCES students (student_id));
考题
You need to modify the STUDENTS table to add a primary key on the STUDENT_ID column. The table is currently empty. Which statement accomplishes this task?()
A. ALTER TABLE students ADD PRIMARY KEY _ id;B. ALTER TABLE students ADD CONSTRAINT PRIMARY KEY (student_id);C. ALTER TABLE students ADD CONSTRAINT stud_id_pk PRIMARY KEY student_id;D. ALTER TABLE students ADD CONSTRAINT stud_id_pk PRIMARY KEY (student_id);E. ALTER TABLE students MODIFY CONSTRAINT stud_id_pk PRIMARY KEY (student_id);
考题
Which statement explicitly names a constraint? ()
A. ALTER TABLE student_grades ADD FOREIGN KEY (student_id) REFERENCES students (student_id);B. ALTER TABLE student_grades ADD CONSTRAINT NAME = student_id_fk FOREIGN KEY (student_id) REFERENCES students (student_id);C. ALTER TABLE student_grades ADD CONSTRAINT student_id_fk FOREIGN KEY (student_id) REFERENCES students (student_id);D. ALTER TABLE student grades ADD NAMED CONSTRAINT student_id_fk FOREIGN KEY (student_id) REFERENCES students (student_id);E. ALTER TABLE student grades ADD NAME student_id_fk FOREIGN KEY (student_id) REFERENCES students (student_id);
考题
Examine the statement:GRANT select, insert, updateON student_gradesTO managerWITH GRANT OPTION;Which two are true?()
A. MANAGER must be a role.B. It allows the MANAGER to pass the specified privileges on to other users.C. It allows the MANAGER to create tables that refer to the STUDENT_GRADES table.D. It allows the MANAGER to apply all DML statements on the STUDENT_GRADES table.E. It allows the MANAGER the ability to select from, insert into, and update the STUDENT_GRADES table.F. It allows the MANAGER the ability to select from, delete from, and update the STUDENT_GRADES table.
考题
Which three are true about the large pool for an Oracle database instance that supports shared serverconnections?()
A. Allocates memory for RMAN backup and restore operationsB. Allocates memory for shared and private SQL areasC. Contains a cursor area for storing runtime information about cursorsD. Contains stack spaceE. Contains a hash area performing hash joins of tables
考题
You are a database developer for a container manufacturing company. The containers produced by your company are a number of different sizes and shapes. The tables that store the container information are shown in the Size, Container, and Shape Tables exhibit:SizeSizeIDSizeNameHeightContainerContainerIDShapeIDSizeIDShapeShapeIDShapeNameMeasurementsA sample of the data stored in the tables is shown below:Size TableSizeID SizeName Height1 Small 402 Medium 603 Large 804 Jumbo 100Shape TableShapeID ShapeName Measurement1 Triangle 102 Triangle 203 Triangle 304 Square 205 Square 306 Square 407 Circle 158 Circle 259 Circle 35Periodically, the dimensions of the containers change. Frequently, the database users require the volume of a container. The volume of a container is calculated based on information in the shape and size tables.You need to hide the details of the calculation so that the volume can be easily accessed in a SELECT query with the rest of the container information. What should you do?A. Create a user-defined function that requires ContainerID as an argument and returns the volume of the container.B. Create a stored procedure that requires ContainerID as an argument and returns the volume of the container.C. Add a column named volume to the container table. Create a trigger that calculates and stores volume in this column when a new container is inserted into the table.D. Add a computed column to the container table that calculates the volume of the container.
考题
Which statement is true about a forwarding table?()
A.It stores a subset of information from the routing table.B.It contains routes learned from all protocols to a destination.C.It provides a database for routes selected and placed into the routing table.D.Every routing protocol maintains its own forwarding table.
考题
An application architecture specifies the technologies to be used to implement one or more information systems. It serves as an outline for detailed design, construction, and implementation. Given the models and details, include （ ）, we can distribute data and processes to create a general design of application architecture. The design will normally be constrained by architecture standards, project objectives, and （ ）. The first physical DFD to be drawn is the （ ）. The next step is to distribute data stores to different processors. Data（ ）are two types of distributed data which most RDBMSs support. There are many distribution options used in data distribution. In the case of（请作答此空）, we should record each table as a data store on the physical DFD and connect each to the appropriate server.A.storing all data on a single server
B.storing specific tables on different servers
C.storing subsets of specific tables on different servers
D.duplicating specific tables or subsets on different servers
考题
Which statement is true about a forwarding table?（）A、It stores a subset of information from the routing table.B、It contains routes learned from all protocols to a destination.C、It provides a database for routes selected and placed into the routing table.D、Every routing protocol maintains its own forwarding table.
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You discover that the schema changes that were recently made to your SQL Server 2005 database have caused your Web site to stop functioning. It is unclear who made the changes. TestKing.com now mandates that all changes to the database schema be tracked. You need to implement a mechanism that will track schema changes in your database. What should you do？（）A、Implement a stored procedure that writes data about schema changes to a log table.B、Implement DDL AFTER triggers that write user and schema information to a log table.C、Implement a DML INSTEAD OF trigger that writes data about schema changes to a log table.D、Implement a DML AFTER trigger that writes data about schema changes to a log table.
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pany has implemented numerous multilayer switches that utilize FIB tables. Which statement is true about the Forward Information Base （FIB） table？（）A、 The FIB is derived from the IP routing table and is optimized for maximum lookup throughput. B、 The FIB table is derived from the Address Resolution Protocol table， and it contains Layer 2 rewrite （MAC） information for the next hop.C、 When the FIB table is full， a wildcard entry redirects traffic to the Layer 3 engine.D、 The FIB lookup is based on the Layer 2 destination MAC address.E、 None of the other alternatives apply
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You want to start monitoring statistics on the distribution of storage engines that are being used and the average sizes of tables in the various databases. Some details are as follows: The Mysql instance has 400 databases. Each database on an average consists of 25-50 tables. You use the query: SELECT TABLE_SCHEMA, 'ENGINE', COUNT (*), SUM(data_length) total_size FROM INFORMATION_SCHEMA.TABLES WHERE TABLE_TYPE= 'BASE TABLE' GROUP BY TABLE_SCHEMA, 'ENGINE' ; Why is this query slow to execute?（）A、Collecting information requires large numbers of locks on various INFORMATION_SCHEMA tablesB、Aggregating details from various storage engine caches for the final output is time consumingC、Collecting information requires various disk-level operations and is time consumingD、Counting and summarizing all table pages in the InnoDB shared tablespace is time consuming
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You discover that your Recycle Bin contains two tables with the same name, MY_TABLE. You also have a table named MY_TABLE in your schema. You execute the following statement: FLASHBACK TABLE my_table TO BEFORE DROP RENAME TO my_table2; What will be the result of executing this statement?（）A、One of the tables is recovered from the Recycle Bin using a First In First Out (FIFO) approach.B、One of the tables is recovered from the Recycle Bin using a Last In First Out (LIFO) approach.C、Both the tables are recovered from the Recycle Bin with one table renamed to MY_TABLE2 and the other to a system-generated name.D、None of the tables are recovered from the Recycle Bin, and the statement returns an error.
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Which three are true about the large pool for an Oracle database instance that supports shared serverconnections?（）A、Allocates memory for RMAN backup and restore operationsB、Allocates memory for shared and private SQL areasC、Contains a cursor area for storing runtime information about cursorsD、Contains stack spaceE、Contains a hash area performing hash joins of tables
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Which statements are correct about temporary tables（）A、Indexes and views can be created on temporary tables.B、Both the data and the structure of temporary tables can be exported.C、Temporary tables are always created in a user’s temporary tablespace.D、The data inserted into a temporary table in a session is available to other sessions.E、Data manipulation language （DML） locks are never acquired on the data of temporary tables
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You need to modify the STUDENTS table to add a primary key on the STUDENT_ID column. The table is currently empty.Which statement accomplishes this task?（）A、ALTER TABLE students ADD PRIMARY KEY student_id;B、ALTER TABLE students ADD CONSTRAINT PRIMARY KEY (student _ id);C、ALTER TABLE students ADD CONSTRAINT stud _ id _pk PRIMARY KEY (student _ id);D、ALTER TABLE students MODIFY CONSTRAINT stud _ id _pk PRIMARY KEY (student _ id);
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You work as a database administrator for Certkiller .com. You enabled tracing while creating a listener to your database. What additional information is available to you when you enable tracing？（）A、Information about each Oracle Net connection.B、Information about each entry in theLinstener.orafileC、Information about the changed done in the databaseD、Information about the different listeners in your systemE、Information about all thenondatabasefiles required to operate the database
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You need to modify the STUDENTS table to add a primary key on the STUDENT_ID column. The table is currently empty. Which statement accomplishes this task?（）A、ALTER TABLE students ADD PRIMARY KEY _ id;B、ALTER TABLE students ADD CONSTRAINT PRIMARY KEY (student_id);C、ALTER TABLE students ADD CONSTRAINT stud_id_pk PRIMARY KEY student_id;D、ALTER TABLE students ADD CONSTRAINT stud_id_pk PRIMARY KEY (student_id);E、ALTER TABLE students MODIFY CONSTRAINT stud_id_pk PRIMARY KEY (student_id);
考题
Which statement explicitly names a constraint?（）A、ALTER TABLE student_grades ADD FOREIGN KEY (student_id) REFERENCES students(student_id);B、ALTER TABLE student_grades ADD CONSTRAINT NAME = student_id_fk FOREIGN KEY (student_id) REFERENCES students(student_id);C、ALTER TABLE student_grades ADD CONSTRAINT student_id_fk FOREIGN KEY (student_id) REFERENCES students(student_id);D、ALTER TABLE student grades ADD NAMED CONSTRAINT student_id_fk FOREIGN KEY (student_id) REFERENCES students(student_id);E、ALTER TABLE student grades ADD NAME student_id_fk FOREIGN KEY (student_id) REFERENCES students(student_id);
考题
You need to modify the STUDENTS table to add a primary key on the STUDENT_ID column. The table is currently empty. Which statement accomplishes this task?（）A、ALTER TABLE students ADD PRIMARY KEY student_id;B、ALTER TABLE students ADD CONSTRAINT PRIMARY KEY (student_id);C、ALTER TABLE students ADD CONSTRAINT stud_id_pk PRIMARY KEY student_id;D、ALTER TABLE students ADD CONSTRAINT stud_id_pk PRIMARY KEY (student_id);E、ALTER TABLE students MODIFY CONSTRAINT stud_id_pk PRIMARY KEY (student_id);
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You work in a company which is named Wiikigo Corp. The company uses SQL Server 2008. You are the administrator of the company database. Now you are in charge of a SQL Server 2008 instance. There is a database which is named Sellings in the instance. The Sellings database contains a table named Productions. The table is used to stores information about all types of products. The Productions table is often queried by users on the basis of the RadioSize column. The RadioSize column contains the NULL value for all products other than Radios. Currently no index exists on the RadionSize column. According to the requirement of the company CIO, you have to optimize the query performance and reduce the effect on the disk space to the least. So what action should you perform to achieve this goal?（） A、On the Products table, you should create a view. B、On the RadioSize column, you should create a clustered index C、On the RadioSize column, you should create a filtered index D、On the RadioSize column, you should create a unique clustered index
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You are responsible for managing a SQL Server 2005 database that stores sales information. Many values in nchar columns in the database tables contain preceding or trailing spaces. You need to implement a mechanism that selects the data from the tables without leading and trailing spaces. Your solution must be available for reuse in Transact-SQL statements and views. What should you do？（）A、Create DML triggers that query the inserted and deleted tables.B、Create a stored procedure that calls the LTRIM and RTRIM built-in functions.C、Create a Transact-SQL function that calls the LTRIM and RTRIM built-in functions.D、Call the TRIM built-in function.
考题
单选题Which statement is true about a forwarding table?（）A
It stores a subset of information from the routing table.B
It contains routes learned from all protocols to a destination.C
It provides a database for routes selected and placed into the routing table.D
Every routing protocol maintains its own forwarding table.
考题
单选题You discover that your Recycle Bin contains two tables with the same name， MY_TABLE. You also have a table named MY_TABLE in your schema. You execute the following statement： FLASHBACK TABLE my_table TO BEFORE DROP RENAME TO my_table2； What will be the result of executing this statement？（）A
One of the tables is recovered from the Recycle Bin using a First In First Out （FIFO） approach.B
One of the tables is recovered from the Recycle Bin using a Last In First Out （LIFO） approach.C
Both the tables are recovered from the Recycle Bin with one table renamed to MY_TABLE2 and the other to a system-generated name.D
None of the tables are recovered from the Recycle Bin， and the statement returns an error.
考题
单选题You need to modify the STUDENTS table to add a primary key on the STUDENT_ID column. The table is currently empty. Which statement accomplishes this task?（）A
ALTER TABLE students ADD PRIMARY KEY _ id;B
ALTER TABLE students ADD CONSTRAINT PRIMARY KEY (student_id);C
ALTER TABLE students ADD CONSTRAINT stud_id_pk PRIMARY KEY student_id;D
ALTER TABLE students ADD CONSTRAINT stud_id_pk PRIMARY KEY (student_id);E
ALTER TABLE students MODIFY CONSTRAINT stud_id_pk PRIMARY KEY (student_id);
考题
多选题Examine the statement: GRANT select, insert, update ON student_grades TO manager WITH GRANT OPTION; Which two are true?（）AMANAGER must be a role.BIt allows the MANAGER to pass the specified privileges on to other users.CIt allows the MANAGER to create tables that refer to the STUDENT_GRADES table.DIt allows the MANAGER to apply all DML statements on the STUDENT_GRADES table.EIt allows the MANAGER the ability to select from, insert into, and update the STUDENT_GRADES table.FIt allows the MANAGER the ability to select from, delete from, and update the STUDENT_GRADES table.
考题
多选题Which three are true about the large pool for an Oracle database instance that supports shared serverconnections?（）AAllocates memory for RMAN backup and restore operationsBAllocates memory for shared and private SQL areasCContains a cursor area for storing runtime information about cursorsDContains stack spaceEContains a hash area performing hash joins of tables
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