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Event Occurrence of a process is called event. In other words, the object can receive many input instructions. The changes which occur due to these instructions are known as e
Given the following set of functional dependencies {cf→ bg, g → d, cdg → f, b → de, d → c} defined on R(b,c,d,e,f,g) a. Is cf→ e implied by the FDs? b. Is dg a superkey?
Consider the two relations given below Given that A is the primary key of R, D is the primary key of S and there is a referential integrity among S.A and R.A, discuss all
What is Relational Algebra? Relational algebra is a Procedural query Language?
Limitations of File Based System The file-based system has some limitations. The limitations are listed as follows: Isolation and separation of data: When the data is
What are the several forms of identity? a) Value b) Name c) Built-in
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
What is a database? Database - Basically in simple terms A database is a collection of inter related data and/or information stored so which it is available to several users
QUESTION (a) Consider a car database consisting of car model, car make, car origin, Engine capacity, color, cost.
compare the features of oracle RDBMS with MySQL and Microsoft SQL server
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