071考試是OCP認證的一個重要科目,不少考生都在這里受傷,對此我們專門收集整理了近期071考試的原題,并對071題庫進行了講解,希望幫助大家順利通過071考試。
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071考試原題分享-第66題、choose two
Examine the structure proposed for the TRANSACTIONS table:
Which two statements are true regarding the creation and storage of data in the above table structure?
A) The TRANS_DATE column would be able to store day, month, century, year, hour, minutes, seconds,
and fractions of seconds.
B) The CUST_STATUS column would store exactly one character.
C) The TRANS_VALIDITY column would have a maximum size of one character.
D) The TRANS_VALIDITY column would give an error.
E) The CUST_STATUS column would give an error.
F) The CUST_CREDIT LIMIT column would not be able to store decimal values.
Answer:BD
(解析:定義列的數據類型時,char 的可以省略位數,默認是 1,但是 varchar2 不能省略位數,否則報錯。
注意 date 和 timestamp 的格式區別:
date 類型存儲數據的格式為年月日時分秒,可以精確到秒
timestamp 類型存儲數據的格式為年月日時分秒,可以精確到納秒(9 位)
)
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