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The physical location of a record is determined by which mathematical formula that transforms a file key into a record location? The physical location of a record is determined
what is inverted and multilist structure
what is query processing?
If R1 and R2 are two relations or functions, then the result of R3 = R1 × R2 is the combination of tuples that are in R1 and R2. The product is associative and commutative. Degr
What subschema expresses ? A subschema expresses the external view. (External schemas are called also called as subschemas)
Physical Records These are the records that are stored in the secondary storage devices. For the database relation, physical records are the group of fields kept in adjacent me
How to reduce data redundency
Explain the Check Clause The CHECK clause is employed to at the end of a CREATE TABLE statement specify table constraints. This is known as table-based constraint because it ap
Define the Attribute Inheritance The attributes of a higher level entity set are inherited through a lower level entity set made by specialization-generalization hierarchy. Nam
In an E-R diagram an entity set is represent by? In an E-R digram entity set is represted by rectangle.
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