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 resu

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.

第2题：

You just issued the following statement: ALTER TABLE SALES DROP COLUMN PROFIT. Which of the following choices identifies when the column will actually be removed from Oracle?（）

• A、Immediately following statement execution 
• B、After the ALTER TABLE DROP UNUSED COLUMNS command is issued 
• C、After the ALTER TABLE SET UNUSED COLUMN command is issued 
• D、After the ALTER TABLE MODIFY command is issued

第3题：

第4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.

第5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.

第6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); 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.

第7题：

Which of the following datatypes store time-zone information in the database?（）

• A、TIMESTAMP
• B、DATE
• C、TIMESTAMP WITH TIME ZONE
• D、TIMESTAMP WITH LOCAL TIME ZONE
• E、DATETIME

第8题：

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.

第9题：

You created the ORDERS table in your database by using the following code：   SQL> CREATE TABLE ORDERS （ORDER_DATE TIMESTAMP（0） WITH TIME ZONE）；   Then， you inserted data in the ORDERS table and saved it by issuing the following statements：SQL> INSERT INTO ORDERS VALUES（’18-AUG-00 10：26：44 PM America/New_York’）；   SQL> INSERT INTO ORDERS VALUES（’23-AUG-02 12：46：34 PM America/New_York’）；   SQL> COMMIT；   Next， you issued the following statement to change the time zone for the database：   SQL> ALTER DATABASE SET TIME_ZONE=’Europe/London’；   What will be the result of executing the above statement？（）  

• A、 The statement will fail.
• B、 The statement will be executed successfully， and the new time zone will be set for the database.
• C、 The statement will be executed successfully， but the new time zone will be set for the current session.
• D、The statement will be executed successfully， but the new time zone will neither be set for the database nor for a specific session.

第10题：

The current time zone for one of the user sessions is set to the database local time zone. For one application， the user session requires the time zone to be set to the local operating system time zone without affecting other user sessions. Which two solutions could the user implement to achieve this objective？ （）

• A、 use the ALTER SYSTEM command to change the time zone
• B、 use the ALTER SESSION command to change the time zone
• C、 use the ALTER DATABASE command to change the time zone
• D、 set the value for the operating system variable ORA_SDTZ on the client machine
• E、 set the value for the operating system variable ORA_SDTZ on the database server machine