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define attribute inheritance with example?
Explain the challenges before an E-business management.
A database is a set of data. But, is the data kept in a database trustworthy? To answer that query we must first answer the question. What is integrity? Integrity simply means t
About Attribute inheritance
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
Suppose R is a relation with attributes A1, A2,..., An. As a function of n, tell how many superkeys R has, if: 1.1 The only key is A1. 1.2 The only key is A1 and A2. 1.3 The o
Which method is used to key transformation ? A hash method is used to key transformation.
Define the concept of Object Diagram An object diagram shows a set of the objects and their relationships with each other at a point of time. In a static view, object diagram
Query Processor The query language processor is responsible for taking query language statements or shifting them from the English-like syntax of the query language to a form
create an e-r diagram usuing graphical dipicted software that could theoritically be used in resturant application
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