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What is vertical fragmentation?
Vertical fragmentation divides the relation by decomposing the scheme R of relation r.
Differentiate between static hashing and dynamic hashing. Ans: Static Hashing comprises the number of primary pages in the directory fixed. So, while a bucket is full, we requ
Load sample data into the database tables design and test queries to return the following information • All rows and columns for employees • All rows and columns for customers •
atient(PNumber, Name, NHS_no, Amount_due, DNO, Doctor, Medical_Treatment), relation of schema Staff(StaffNum, Name, DNO, Task) and relation of schema Dept(DNO, Name, Location, Dire
what is Storage-Device Hierarchy question
A database administrator''s responsibilities and data contents
Improved availability: The data in a distributed system may be replicated so that it is at more than one site. Thus, the failure of a node or a communication link does not necessar
What are called multilevel indices? Indices with two or more levels are known as multilevel indices.
WHAT IS DATABASE TECHNOLOGIES
What are three components of the schema architecture proposed by ANSI/SPARC? The three component schema architecture proposed by ANSI/SPARC is as given below: External sche
Creating views with Replace option : This option is used to alter the definition of the view without recreating and dropping it or regranting object privileges previously granted o
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