Derived horizontal fragmentation, Database Management System

Assignment Help:

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, Director).

STAFF has a horizontal fragmentation derived from that of DEPARTMENTS and a semi-join on the DNO attribute

Related Discussions:- Derived horizontal fragmentation

In e-r diagram how relationship type is represented, In E-R Diagram how rel...

In E-R Diagram how relationship type is represented ? In E-R Diagram relationship type is represented as a Diamond.

Multiple column queries-syntax, Multiple column Queries: Syntax: ...

Multiple column Queries: Syntax: SELECT COLUMN1, COL2,...... FROM TABLE WHERE (COLUMN1, COL2, ...) IN (SELECT COLUMN1, COL2,.... FROM TABLE WHERE );

What are the reasons for having variable length records, What are the reaso...

What are the reasons for having variable length records? What are the various ways to store variable length records? Variable-length records arise in a database in various wa

Group by clauses-data manipulation language, Group By clauses • It is ...

Group By clauses • It is used to group database tuples on the basis of definite common attribute value like as employees of a department. WHERE clause still can be used

What is the use of keyword isa, What is the use of keyword ISA? The use...

What is the use of keyword ISA? The use of keyword ISA is to show that a class is a specialization of another class.

Computing the closure of a set of functional dependency, What is meant by c...

What is meant by computing the closure of a set of functional dependency? The closure of F denoted by F + is the set of functional dependencies logically implied by F.

By which techniquestransaction processing is associated, By which technique...

By which techniquesTransaction processing is associated? Transaction processing is associated by producing detail, summary, or exception reports and recording a business activi

To eliminate duplicate rows-data manipulation language, To eliminate duplic...

To eliminate duplicate rows (distinct operator) Example: SELECT DISTINCT DEPTNO FROM EMP;

List the armstrong axioms for functional dependencies, List the Armstrong's...

List the Armstrong's axioms for functional dependencies. What do you understand by soundness and completeness of these axioms? Ans: The Armstrong's axioms are: F1:

What is the difference between link and reference, What is the difference b...

What is the difference between link and reference? The fundamental difference between links and references is that links are symmetrical on the other hand references refer only

Write Your Message!

Name

Email id

Message

Verfication Code

User Account

All Pages