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Which of the two types of Data Independence Types is harder to achieve?
Wiki User
∙ 12y ago
The ability to modify a scheme definition in one level without affecting a scheme definition in next higher level is called data independence
there are two types of data independence
physical data independence:- refers to the ability to modify the scheme followed at the physical level without affecting the scheme followed at logical level
logical data independence:- refers to the ability to modify the conceptual scheme without affecting the schemes followed at view level
logical independence is difficult to achieve
Wiki User
∙ 12y ago
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