单选题Which of the following would be affected by setting NLS_LENGTH_SEMANTICS=CHAR?（）AAll objects in the databaseBTables owned by SYS and SYSTEMCData dictionary tablesDNCHAR columnsECHAR columns
单选题
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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