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Domain Constraints Domain constraints are primarily formed for defining the logically correct values for an attribute of a relation. The relation allows attributes of a relatio
Lack of Redundancy We have talked about the problems of repetition of information in a database. Such repetition should be stay away as much as possible. Let us state once again t
lock and types of lock
Define the concept of aggregation. Give two examples where this concept is useful. Ans: Aggregation transforms a relationship among the objects into a higher-level object. A
Which is a legal expression in SQL? SELECT NAME FROM EMPLOYEE is a legal expression in SQL.
why data in an RDMS need to be normalised
The Update Operations : Update operations are used for altering database values. The constraint violations faced by this operation are logically the similar as the problem faced
Normal 0 false false false EN-US X-NONE X-NONE
anyone have a textbook solutions case fair, 8 edition of vol 1 ?, please give me
1.Why we need data mining? Give an example to illustrate your answer. 2. Why data mining is considered as "misleading name"? 3. Distinguish the difference between database an
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