自我效能感是指（） 相信自己具有能力可以达到多个目标。 相信自己具有能力可以达到某个目标。 相信他人具有能力可以达到某个目标。 相信他人具有能力可以达到多个目标。
You are using flat files as the data source for one of your data warehousing applications. To optimize the application performance， you plan to move the data from the flat files to clustered tables in an Oracle database.While migrating the data， you want to have minimal impact on the database performance and optimize the dataload operation. Which method would you use to load data into the Oracle database（） Use the external table population.。 Use the Oracle Data Pump export and import utility.。 Use the conventional path data load of the SQL*Loader utility.。 Use the INSERT INTO...SELECT command to load the data。
Examine the structure of the EMPLOYEES table: EMPLOYEE_ID NUMBER Primary Key FIRST_NAME VARCHAR2(25) LAST_NAME VARCHAR2(25) HIRE_DATE DATE Which INSERT statement is valid? （） INSERT INTO employees (employee_id, first_name, last_name, hire_date) VALUES (1000, 'John', 'smith','01/01/01);。 INSERT INTO employees(employee_id, first_name, last_name, hire_date) VALUES (1000, 'John', 'smith','01 january 01');。 INSERT INTO employees(employee_id, first_name, last_name, Hire_date) VALUES (1000, 'John', 'smith', To_ date ('01/01/01));。 INSERT INTO employees(employee_id, first_name, last_name, hire_date) VALUES (1000, 'John', 'smith','01-Jan-01')。
You are working in an online transaction processing （OLTP） environment. You used the FLASHBACK TABLE command to flash back the CUSTOMERS table. Before executing the FLASHBACK TABLE command， the System Change Number （SCN） was 663571. After flashing back the CUSTOMERS table， you realize that the table is not in the correct state and the resultant changes are not what you had desired. So， you need to reverse the effects of the FLASHBACK TABLE command while ensuring that： a） No other user data in the database is affected. b） The operation takes the minimum possible time. Which option would you choose？（） use the ROLLBACK command with SCN 663571。 perform Flashback Transaction Query with SCN 663571。 execute the FLASHBACK DATABASE statement to retrieve the CUSTOMERS table as it was at SCN 663571。 execute another FLASHBACK TABLE statement to retrieve the CUSTOMERS table as it was at SCN 663571。
某男性患者，30岁，胸腹背部大面积烧伤8h。查体：BP68/sommHg，P121/min，cvp2.5mmH20，尿量15ml/h，诊断为烧伤并发休克。该患者的休克，属于（） 感染性休克。 失血性休克。 创伤性休克。 失液性休克。 心源性休克。
Your database is started by using the server parameter file （SPFILE）. You issued this command to change the value of the LOG_BUFFER initialization parameter：
ALTER SYSTEM SET LOG_BUFFER=24M SCOPE=BOTH;
What would be the outcome of this command？（）
