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Types of data independence
Data independence can be classified into the following two types:
Physical Data Independence: This means that for any change made in the physical schema, the requirement to change the logical schema is minimal. This is practically simpler to achieve.
Logical Data Independence: This means that for any change made in the logical schema, the requirement to change the external schema is minimal. As we shall see, this is a little complex to achieve.
You are required to program (in a high level language such as C, C++, Java) and implement a cache simulator which will have the following inputs and outputs:- INPUTS
What is the use of rename operation? Rename operation is used to rename both relations and an attributes. It uses the as clause, taking the form: Old-name as new-name.
Assume that you are responsible for selecting a new DBMS product for Sohar Hospital
write program
Normalize the given relation to 3NF, justifying each step
Hi I have got an assignment for making an er diagram for market management software can any budy help me?
what is cascading? what is rollback cascading? please explain in detail
Define Cascading rollback The phenomenon where a single transaction failure leads to a series of transaction rollbacks is known as Cascading rollback.
Entities Let us first be aware of the question: What are entities? An entity is an object of concern used to show the things in the actual world, e.g., table, car, bo
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
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