单选题You create a data block based on a relation table containing a REF column. You select the REF column for your form module. Which statement about the REF column is true?（）A It is created as a nondisplay item. B The Lock Record property is set to Yes. C

题目
单选题
You create a data block based on a relation table containing a REF column. You select the REF column for your form module. Which statement about the REF column is true?（）
A

It is created as a nondisplay item. 

B

The Lock Record property is set to Yes. 

C

It cannot be referenced in item level triggers. 

D

It is placed on the canvas with the highest sequence number.

相似考题

1.The EMPLOYEES table has these columns:Management wants to add a default value to the SALARY column. You plan to alter the table by using this SQL statement:What is true about your ALTER statement?()A. Column definitions cannot be altered to add DEFAULT values.B. A change to the DEFAULT value affects only subsequent insertions to the table.C. Column definitions cannot be altered at add DEFAULT values for columns with a NUMBER data type.D. All the rows that have a NULL value for the SALARY column will be updated with the value 5000.

2.You need to create a data block for DML operations in the NEW_EMPLOYEE form module. Which data source can you use for this block?（）A、REF cursor query. B、Stored function. C、From clause query. D、Transactional trigger.

3.Your company Web site includes a page that customers use to send feedback about the company and its products. You use a SQL Server 2005 database to store the comments in the Comments column of a table named Feedback. You need to implement full-text searching so that you can run reports on the comments. Which two actions should you perform? （）A、 Create a nonclustered index on the Comments column. B、 Execute the USE Master Transact-SQL statement. C、 Create a full-text catalog. D、 Create a full-text index on the Comments column.

4.You create a data block based on a relation table containing a REF column. You select the REF column for your form module. Which statement about the REF column is true?（）A、It is created as a nondisplay item. B、The Lock Record property is set to Yes. C、It cannot be referenced in item level triggers. D、It is placed on the canvas with the highest sequence number.

更多“单选题You create a data block based on a relation table containing a REF column. You select the REF column for your form module. Which statement about the REF column is true?（）A It is created as a nondisplay item. B The Lock Record property is set to Yes. C ”相关问题

  • 第1题：

    You work in a company which 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 named named Dworks in the instance. The Dworks table has a table named BillDetails which has a clustered primary key named BillId on the BillId column. The BillDetails table has a single XML column named GoodsDetails. The XML column has an XML index and XML data are stored in this XML column. A new column named GoodsID is added to the BillDetails table. GoodsID must be included in the primary key.  So what action should you perform to achieve this goal？（）  

    • A、You should drop the XML index on the table. Modify the primary key. Recreate the XML index 
    • B、You should alter the XML index and set the ALLOW_ROW_LOCKS = OFF option. Alter the primary key and set the ALLOW_ROW_LOCKS = ON option. 
    • C、You should move the XML data to a temporary table. Clear the XML data from the original table by setting the GoodsDetails column to NULL. Modify the primary key. Repopulate the ProductSpecs column. 
    • D、You should disable the XML index on the GoodsDetails column. Modify the primary key.Enable the XML index on the ProductSpecs column.

    正确答案:A

  • 第2题：

    Which of the following datatypes are used in situations where you want an ordered set of data elements, where every element is the same datatype, and where you predefine the number of elements that appear in the set?（）

    • A、REF 
    • B、TABLE 
    • C、CLOB 
    • D、VARRAY

    正确答案:D

  • 第3题：

    Which two are true about aggregate functions? （）

    • A、You can use aggregate functions in any clause of a SELECT statement.
    • B、You can use aggregate functions only in the column list of the select clause and in the WHERE clause of a SELECT statement.
    • C、You can mix single row columns with aggregate functions in the column list of a SELECT statement by grouping on the single row columns.
    • D、You can pass column names, expressions, constants, or functions as parameter to an aggregate function.
    • E、You can use aggregate functions on a table, only by grouping the whole table as one single group.
    • F、You cannot group the rows of a table by more than one column while using aggregate functions.

    正确答案:A,D

  • 第4题：

    The EMP_DEPT block in your EMPLOYEE form is based on a view in an Oracle8 database. The items in this block have the Update Allowed property set to Yes. Which database feature makes it possible to permanently modify the underlying view?（）

    • A、REF cursor. 
    • B、Instead Of trigger. 
    • C、Stored procedure that returns object values. 
    • D、The underlying view cannot be modified because DML on a view is not supported.

    正确答案:B

  • 第5题：

    Your Oracle10g database contains a table with a TIMESTAMP TO LOCAL TIME ZONE column. There are about two hundred column values for the column. You issued the following statement：   SQL> ALTER DATABASE SET TIME_ZONE =’Europe/London’；   What will be the result of issuing the above statement？（）

    • A、 The statement will be executed successfully， and a new time zone will be set for the database.
    • B、 The statement will be executed successfully， but a new time zone will not be set for the database.
    • C、 The statement will not be executed successfully because the SET TIME_ZONE clause can be used only with the ALTER SESSION statement.
    • D、 The statement will not be executed successfully because the ALTER DATABASE SET TIME_ZONE statement is used only when the database contains no table with the TIMESTAMP TO LOCAL TIME ZONE column.

    正确答案:D

  • 第6题：

    At design time, you create a query record group for the LOV associated with the HOTEL text item in a form module for the Travel Planner Application. When is the record group populated?（）

    • A、When the user navigates to the HOTEL item. 
    • B、When the form module successfully compiles. 
    • C、After Form Builder validates the SELECT statement and dismisses the New Record Group dialog box. 
    • D、When the user enters data in the HOTEL item, and the Validate from List property for the HOTEL item is set to YES. 

    正确答案:D

  • 第7题：

    You want to implement a master-detail relation between data blocks based on object tables. How would you do this? （）

    • A、Create the relation manually and coordinate the blocks using triggers. 
    • B、Base the relation on a REF pointer using the Data Block Wizard. 
    • C、Base the relation on a foreign key using the Data Block Wizard. 
    • D、This task is not possible because master-detail relations can be implemented only for blocks based on relation tables.

    正确答案:B

  • 第8题：

    单选题
    You want to implement a master-detail relation between data blocks based on object tables. How would you do this? （）
    A

    Create the relation manually and coordinate the blocks using triggers. 

    B

    Base the relation on a REF pointer using the Data Block Wizard. 

    C

    Base the relation on a foreign key using the Data Block Wizard. 

    D

    This task is not possible because master-detail relations can be implemented only for blocks based on relation tables.


    正确答案： A
    解析： 暂无解析

  • 第9题：

    单选题
    At design time, you create a query record group for the LOV associated with the HOTEL text item in a form module for the Travel Planner Application. When is the record group deleted?（）
    A

    When the user navigates to the HOTEL item. 

    B

    When the form module successfully compiles. 

    C

    After Form Builder validates the SELECT statement and dismisses the New Record Group dialog box. 

    D

    When the user enters data in the HOTEL item, and the Validate from List property for the HOTEL item is set to YES.


    正确答案： B
    解析： 暂无解析

  • 第10题：

    单选题
    he data blocks in your form module are based on object tables. How would you create a master-detail relationship between two of these blocks?（）
    A

    Use the Data Block Wizard and base the relation on a REF pointer. 

    B

    In the Object Navigator, select the Relation node under the master block and click the Create icon. Build the relation manually and coordinate the blocks using triggers.

    C

    Use the Data Block Wizard, and base the relation on the primary key-foreign key relationship in the database. 

    D

    This task is not possible because master-detail relations can be implemented only for blocks based on relational tables. 


    正确答案： D
    解析： 暂无解析

  • 第11题：

    单选题
    You create a data block based on a relational table containing a REF column. You select the REF column for your form module. What is true about the items based on the REF column attributes?（）
    A

    The Query Only property is set to Yes. 

    B

    The Conceal Data property is set to Yes. 

    C

    The Insert Allowed property is set to Yes. 

    D

    The Update Allowed property is set to Yes.


    正确答案： B
    解析： 暂无解析

  • 第12题：

    单选题
    You create a data block based on a relation table containing a REF column. You select the REF column for your form module. Which statement about the REF column is true?（）
    A

    It is created as a nondisplay item. 

    B

    The Lock Record property is set to Yes. 

    C

    It cannot be referenced in item level triggers. 

    D

    It is placed on the canvas with the highest sequence number.


    正确答案： D
    解析： 暂无解析

  • 第13题：

    You are creating a form that will access an Oracle8 database. On which three sources can you base a data block?（）

    • A、BFILE 
    • B、REF column 
    • C、Object table 
    • D、Column object 
    • E、INSTEAD-OF trigger

    正确答案:B,C,D

  • 第14题：

    You create a data block based on a relational table containing a REF column. You select the REF column for your form module. What is true about the items based on the REF column attributes?（）

    • A、The Query Only property is set to Yes. 
    • B、The Conceal Data property is set to Yes. 
    • C、The Insert Allowed property is set to Yes. 
    • D、The Update Allowed property is set to Yes.

    正确答案:A

  • 第15题：

    he data blocks in your form module are based on object tables. How would you create a master-detail relationship between two of these blocks?（）

    • A、Use the Data Block Wizard and base the relation on a REF pointer. 
    • B、In the Object Navigator, select the Relation node under the master block and click the Create icon. Build the relation manually and coordinate the blocks using triggers.
    • C、Use the Data Block Wizard, and base the relation on the primary key-foreign key relationship in the database. 
    • D、This task is not possible because master-detail relations can be implemented only for blocks based on relational tables. 

    正确答案:A

  • 第16题：

    Which two statements are true regarding the ORDER BY clause? （）

    • A、It is executed first in the query execution 
    • B、It must be the last clause in the SELECT statement 
    • C、It cannot be used in a SELECT statement containing a HAVING clause
    • D、You cannot specify a column name followed by an expression in this clause 
    • E、You can specify a combination of numeric positions and column names in this clause

    正确答案:B,E

  • 第17题：

    36 You are creating a report wizard to create a matrix report. The query build, you select the patient_name column from the patient table; the doctor_name from the doctors table; and the doctor_ID, patient_ID and ID columns from the procedure table. In the report wizard you select patient_name as the row value, doctor_ID as the column values and the count as the cell values. You need to add a total for each doctors column. In the wizard report which tab will allow you to create the summary column?（）

    • A、Rows 
    • B、Totals 
    • C、Columns 
    • D、Cells 
    • E、Data

    正确答案:B

  • 第18题：

    The EMPLOYEES table has these columns: LAST_NAME VARCHAR2(35) SALARY NUMBER(8,2) HIRE_DATE DATE Management wants to add a default value to the SALARY column. You plan to alter the table by using this SQL statement: ALTER TABLE EMPLOYEES MODIFY (SALARY DEFAULT 5000); Which is true about your ALTER statement?（）

    • A、Column definitions cannot be altered to add DEFAULT values.
    • B、A change to the DEFAULT value affects only subsequent insertions to the table.
    • C、Column definitions cannot be altered to add DEFAULT values for columns with a NUMBER data type.
    • D、All the rows that have a NULL value for the SALARY column will be updated with the value 5000.

    正确答案:B

  • 第19题：

    In the COURSE_ENROLLMENT form module, you define a master-detail relation between the COURSES_OFFERED data block and the STUDENT data block, respectively. To implement block coordination, which statement must be true?（）

    • A、 The Enforce Primary Key property on the STUDENT block is set to Yes. 
    • B、 The Alias property on the COURSES_OFFERED block is set to Student. 
    • C、 The Copy Value from item property on the foreign key item in the STUDENT blocks is set to the primary key item of the COURSES_OFFERED block. 
    • D、 The Synchronize with item property on the foreign key item in the STUDENT block is set to the primary key item of the COURSES_OFFERED block.

    正确答案:C

  • 第20题：

    单选题
    You are creating the SAL_INFO data block on the EMP_QUERY form. The SALARY field should only be populated if the logged-on user is a manager. Since this query could potentially return a large amount of records, you have created a stored procedure which uses a ref cursor on which to base the data block. How would you create the data block?（）
    A

    Click the Data Blocks node in the Object Navigator and click the create button. Choose to build the data block manually. Enter the procedure name in the Query Data Source Columns property and the procedure code in the Query Data Source Arguments property. 

    B

    Choose Tools -> Data Block Wizard, select Table as the data source type, and base the data block on the columns included in the procedure. 

    C

    Select the Data Blocks node in the Object Navigator and click the Create button. Choose to build the data block manually, alter the Query Data Source Type property to 'Ref cursor', and enter the name of the procedure in the Query Data Source Name property. 

    D

    Select the Data Blocks node in the Object Navigator and click the Create button. Alter the Query Data Source Name, Query Data Source Columns, and Query Data Source Arguments properties to create a stored procedure that uses a ref cursor. 

    E

    Launch the Data Block Wizard, select Stored Procedures as the data source type, and base the block on the procedure.


    正确答案： A
    解析： 暂无解析

  • 第21题：

    单选题
    Your Oracle10g database contains a table with a TIMESTAMP TO LOCAL TIME ZONE column. There are about two hundred column values for the column. You issued the following statement：   SQL> ALTER DATABASE SET TIME_ZONE =’Europe/London’；   What will be the result of issuing the above statement？（）
    A

     The statement will be executed successfully， and a new time zone will be set for the database.

    B

     The statement will be executed successfully， but a new time zone will not be set for the database.

    C

     The statement will not be executed successfully because the SET TIME_ZONE clause can be used only with the ALTER SESSION statement.

    D

     The statement will not be executed successfully because the ALTER DATABASE SET TIME_ZONE statement is used only when the database contains no table with the TIMESTAMP TO LOCAL TIME ZONE column.


    正确答案： C
    解析： 暂无解析

  • 第22题：

    单选题
    36 You are creating a report wizard to create a matrix report. The query build, you select the patient_name column from the patient table; the doctor_name from the doctors table; and the doctor_ID, patient_ID and ID columns from the procedure table. In the report wizard you select patient_name as the row value, doctor_ID as the column values and the count as the cell values. You need to add a total for each doctors column. In the wizard report which tab will allow you to create the summary column?（）
    A

    Rows 

    B

    Totals 

    C

    Columns 

    D

    Cells 

    E

    Data


    正确答案： B
    解析： 暂无解析

  • 第23题：

    单选题
    You created an encrypted tablespace: You then closed the encryption wallet because you were advised that this is secure. Later in the day, you attempt to create the EMPLOYEES table in the SECURESPACE tablespace with the SALT option on the EMPLOYEE column. Which is true about the result?（）
    A

    It creates the table successfully but does not encrypt any inserted data in the EMPNAME column because the wallet must be opened to encrypt columns with SALT.

    B

    It generates an error when creating the table because the wallet is closed.

    C

    It creates the table successfully, and encrypts any inserted data in the EMPNAME column because the wallet needs to be open only for tablespace creation.

    D

    It generates error when creating the table, because the salt option cannot be used with encrypted tablespaces.


    正确答案： D
    解析： 暂无解析

  • 第24题：

    单选题
    In the COURSE_ENROLLMENT form module, you define a master-detail relation between the COURSES_OFFERED data block and the STUDENT data block, respectively. To implement block coordination, which statement must be true?（）
    A

     The Enforce Primary Key property on the STUDENT block is set to Yes. 

    B

     The Alias property on the COURSES_OFFERED block is set to Student. 

    C

     The Copy Value from item property on the foreign key item in the STUDENT blocks is set to the primary key item of the COURSES_OFFERED block. 

    D

     The Synchronize with item property on the foreign key item in the STUDENT block is set to the primary key item of the COURSES_OFFERED block.


    正确答案： C
    解析： 暂无解析

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