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  • OCP-1Z0-052-V9.02-201题

    201.Why does performance degrade when many UPDATE, INSERT or DELETE statements are issued 
    on a table that 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  
    Answer: C  
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  • 原文地址:https://www.cnblogs.com/hzcya1995/p/13316284.html
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