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What is the main difference between read-only and update methods?
A read-only method does not affect the values of a variable in an object, whereas an update method may alter the values of the variables
a project based on normalization with first, second and third normalization. There need to be a diagram also
Describe Participation Constraints? Participation Constraints - The participation constraint exacts whether the existence of an entity depends on its being related to another
Define union compatibility? Explain why INTERSECTION of two relations cannot be performed if they are not union compatible? Two relations R(A1, A2,-------, An) and S(B1, B2,--
how to calculate frequency count of algorithm
Consider entity type Employee with attributes empNumber (this is unique), empName, and the year when he/she was hired. An employee can either be a technical employee, a marketing e
The data of a view is not physically stored, but derived from one or more tables. True the data of a view is not physically stored
find the name of supplier who supply some red part
What are the various forms of data transparency? a) fragmentation transparency b) replication transparency c) location transparency
What is the meaning of Data Independence ?
What is a cascading update? Referential integrity constraints needs that foreign key values in one table correspond to primary key values in another. If the value of the primar
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