zoukankan      html  css  js  c++  java
  • 【OCP题库】最新CUUG OCP 12c 071考试题库(66题)

    66、(22-19)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:定义列的数据类型时,char 的可以省略位数,默认是 1,但是 varchar2 不能省略位数,否则报错。

    注意 date 和 timestamp 的格式区别:

    date 类型存储数据的格式为年月日时分秒,可以精确到秒

    timestamp 类型存储数据的格式为年月日时分秒,可以精确到纳秒(9 位)

    )

  • 相关阅读:
    Attributes in C#
    asp.net C# 时间格式大全
    UVA 10518 How Many Calls?
    UVA 10303 How Many Trees?
    UVA 991 Safe Salutations
    UVA 10862 Connect the Cable Wires
    UVA 10417 Gift Exchanging
    UVA 10229 Modular Fibonacci
    UVA 10079 Pizza Cutting
    UVA 10334 Ray Through Glasses
  • 原文地址:https://www.cnblogs.com/cnblogs5359/p/10488192.html
Copyright © 2011-2022 走看看