OCP 1Z0 052 95

95. You have a large amount of historical data in a flat  file. Some analysts in your organization need to 
query this data in the file. The file is too large to load the data in it into your current database.  
Which is the most effective method to access this data in your database? 
A.Use the database link. 
B.Use the SQL*Loader utility. 
C.Use the Oracle Data Pump utility. 
D.Create an external table and leave the data in the flat file. 
Answer: D

dblink是两个数据库之间用的
SQL*Loader是把数据载入数据库用的
Oracle Data Pump是oracle的导入导出数据工具
表太大，不能入库，只有使用external table