单项选择题

Which of the following would be affected by setting NLS_LENGTH_SEMANTICS=CHAR?（）

A. All objects in the database
B. Tables owned by SYS and SYSTEM
C. Data dictionary tables
D. NCHAR columns
E. CHAR columns

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单项选择题

Which NLS parameter can be used to change the default Oracle sort method from binary to linguistic for the SQL SELECT statement?（）

A. NLS_LANG
B. NLS_COMP
C. NLS_SORT
D. None of the above

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.