Explain the paths in the association network, Database Management System

Assignment Help:

Explain the paths in the association network

We can analyze use of paths in the association network as given below:

  • Calculate each operation
  • Find associations which it must pass through to get information. Associations could be bi-directional (generally by more than one operation) or unidirectional which can be implemented as pointers.

  For each and every operation, we must know the followings:

  • How frequently is operation needed and how much will it cost?
  • What is fan-out along a path through network? To find fan-out of complete path, multiply average count of each "many" associations found in path with individual fan-outs.
  • What are the objects which satisfy selection criteria (if specified) and are operated on? When most of objects are rejected during traversal for some reason, then a simple nested loop can be inefficient at finding target objects.

 


Related Discussions:- Explain the paths in the association network

Explain normalization, What is Normalization? Database normalization is...

What is Normalization? Database normalization is a data design and organization method applied to data structures based on rules that help building relational databases. In rel

Which operator is cartesian product in relational algebra, Which operator i...

Which operator is Cartesian product in relational algebra? Cartesian product in relational algebra is a binary operator. (It requires two operands. e.g., P X Q)

Read-set(t) and timestamps-optimistic concurrency contents, read-set(T) : E...

read-set(T) : Each data items that are read by a transaction T Timestamps : for all transaction T, the start-time and the end time are reserved for all the three phases.

B2b business uk database, We have a new website where I need someone to 1: ...

We have a new website where I need someone to 1: Inhabit the back end with all the recruitment agencies in the UK. I require someone who is not manually going to do this, but who w

Relationship for college database, Using the concepts defined previous, we ...

Using the concepts defined previous, we have identified that strong entities in COLLEGE database are FACULTY, STUDENT, COURSE and DEPARTMENT. This database also has one weak entity

#normalisation.., define normalisation and functional dependency

define normalisation and functional dependency

Relational database, Convert the following ER - diagram (Entity Relationsh...

Convert the following ER - diagram (Entity Relationship Diagram) into a relational database (the primary keys are underlined): 2160_Convert the following ER - diagram into a

Mis, explain three types of internet risks to the consummers whent he busin...

explain three types of internet risks to the consummers whent he business system is data dependent. how can we minimise these risks

Write Your Message!

Captcha
Free Assignment Quote

Assured A++ Grade

Get guaranteed satisfaction & time on delivery in every assignment order you paid with us! We ensure premium quality solution document along with free turntin report!

All rights reserved! Copyrights ©2019-2020 ExpertsMind IT Educational Pvt Ltd