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Which three statements are true regarding the data types in Oracle Database 10g/11g?（）
A:Only one LONG column can be used per table 
B:A TIMESTAMP data type column stores only time values with fractional seconds 
C:The BLOB data type column is used to store binary data in an operating system file 
D:The minimum column width that can be specified for a VARCHAR2 data type column is one 
E:The value for a CHAR data type column is blank-padded to the maximum defined column width

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出自：Oracle认证

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