Choose two.ide
Examine this partial command:測試
CREATE TABLE cust (ui
cust_id NUMBER(2),this
credit_ limit NUMBER(10)it
)class
ORGANIZATION EXTERNALrequire
Which two clauses are required for this command to execute successfully?command
A) the DEFAULT DIRECTORY clauseim
B) the REJECT LIMIT clausedi
C) the LOCATION clause
D) the ACCESS PARAMETERS clause
E) the access driver TYPE clause
Answer:AD
(解析:外部表建表語句,上面 Answer:看起來都對。可是經過測試,發現 E Answer:能夠不須要指定,可是 directory 必需要制定,還有訪問參數也必需要指定,訪問參數裏面位置參數必需要指定,其它訪問參數能夠忽略,這道題考試的意義在哪兒?)