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What is a homogeneous distributed database?
In homogeneous distributed databases, all sites have the same database management system software, are aware of one another, and agree to cooperate in processing user's requests.
What are the properties of transaction? There are three properties of transactions :- A) Atomicity B) Consistency C) Isolation
sql is relationally complete-justify
State The position of object at any moment is called state. An object can have many states depend upon time. After receiving some input instructions, the object can change its
Define raid? Briefly explain it? A range of disk organization methods, collectively called redundant arrays of independent disks (RAID) o Improvement of reliability throug
In a Hierarchical model of data records are organized ? In the hierarchical model of data records are organized as Tree structure.
How many levels can be viewed in Architecture of the database ? Architecture of the database can be viewed as three levels.
Functional Dependency Consider a relation R that has 2 attributes A and B. The attribute B of the relation is functionally dependent on the attribute A if and only if for every
Q. Explain data aggregatio n and discuss different design constraints. Sol. Aggregation One limitation of the E-R model is that it cannot express relationships amon
What was the method in which records are physically stored in a specified order according to a key field in each record ? A method in which records are physically stored within
Define identify relationship? Identifying relationship: An identifying relationship means in which the child table cannot be uniquely recognize without the parent. For exampl
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