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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- What alternatives are available for controlling data integrity at the field level in the area of computer science?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.Data fragmentation may be defined in a number of different ways. Does "data fragmentation" suggest anything to you?