To what extent may data loss be avoided, and what methods work best?
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To what extent may data loss be avoided, and what methods work best?
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- A null bitmap is used in the variable-length record format to indicate if an attribute has a null value. In rare cases, the majority of a tuple's properties are null. To minimize the cost of a null property to only a single bit, it is possible to change how records are represented.What alternatives are available for controlling data integrity at the field level in the area of computer science?Data fragmentation may be defined in a number of different ways. Does "data fragmentation" suggest anything to you?