Explain the ansi sparc architecture, Database Management System

Assignment Help:

Explain the ANSI SPARC architecture

The three-schema architecture is as well known as ANSI SPARC architecture. The aim of the three-schema architecture is to separate the user applications and the physical database. The view at every of these levels is described by a schema. The procedures of transforming requests and results among levels are known as mappings. In this architecture, schemas can be illustrated at the following three levels:

  • External Level or Subschema - It is the highest level of database abstraction in which only those portions of the database of concern to a user or application program are involved. Any number of user views might exist.
  • Conceptual Level or Conceptual Schema - At this levels of database abstraction all the database entities and the relationships between them are included. There is just only one conceptual schema per database.
  • Internal Level or Physical Schema - It is closest to the physical storage method employed.

Related Discussions:- Explain the ansi sparc architecture

A database administrator'', A database administrator''s responsibilities an...

A database administrator''s responsibilities and data contents

Define data independence, Data independence seems that "the application is...

Data independence seems that "the application is independent of the access strategy and storage structure of data". In other words, the ability to change the schema definition in o

What was the method in which records are physically stored, What was the me...

What was the method in which records are physically stored in a specified order according to a key field in each record ? A method in which records are physically stored within

List the data structures implemented by the storage manager, List the data ...

List the data structures implemented by the storage manager. The storage manager executes the following data structure a) Data files b) Data dictionary c) indices

Databases and data warehouses , Databases and data warehouses both are data...

Databases and data warehouses both are databases and both contains number of rows and columns of tables containing data. Data warehouse is really different from databases because d

Explain the term- query, Explain the term- Query. Queries are used to re...

Explain the term- Query. Queries are used to repossess and show specific records in a table. They can also be used to show specific fields of specific records, which meet the co

File organization, what is file organization? what are file organization te...

what is file organization? what are file organization techniques.explain in detail? explain random file organization technique, multikey file organization technique?what is indexin

Describe physical data independence, Describe Physical Data independence ? ...

Describe Physical Data independence ? Physical Data Independence - It is capacity to modify the internal schema without having to change conceptual schema. Therefore, the exter

Write short notes on transaction state, Write short notes on transaction st...

Write short notes on transaction state? A transaction may not always complete its implementation successfully such a transaction is termed aborted A transaction must be in o

Database project- inventory database for a hardware store, Normal 0 ...

Normal 0 false false false EN-US X-NONE X-NONE MicrosoftInternetExplorer4

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