单项选择题

In a database with the database character set of US7ASCII and a national character set of UTF－8, which datatypes would be capable of storing Unicode data by default?（）

A.VARCHAR2
B.CHAR
C.NVARCHAR2
D.CLOB
E.LONG
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单项选择题
在Access2010中，数据库的基础和核心是()。
A表
B窗体
C模块
D查询
单项选择题
Which of the following NLS_SORT parameter values would result in case－insensitive and accent－insensitive binary sorts?（）
A.NLS_SORT = BINARY
B.NLS_SORT = BINARY_AI
C.NLS_SORT = BINARY_CI
D.NLS_SORT = BINARY_AI_CI
E.Binary sorts are case insensitive and accent insensitive by default.
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