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单选题
Why does performance degrade when many UPDATE， INSERT， or DELETE statements are issued on a tablethat has an associated Bitmap index（）
A
The DML operations re-create the Bitmap index blocks.
B
The Bitmap index is rebuilt automatically after a DML operation.
C
The smallest amount of a bitmap that can be locked is a bitmap segment.
D
Additional time is taken to remove NULL values from the Bitmap index after a DML operation.
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更多 “单选题Why does performance degrade when many UPDATE， INSERT， or DELETE statements are issued on a tablethat has an associated Bitmap index（）A The DML operations re-create the Bitmap index blocks.B The Bitmap index is rebuilt automatically after a DML operation.C The smallest amount of a bitmap that can be locked is a bitmap segment.D Additional time is taken to remove NULL values from the Bitmap index after a DML operation.” 相关考题
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