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What are the different views of data in a database management systems?
Wiki User
∙ 12y ago
Classifications of database views (in Oracle)
1. Theoretical updateable
2. Partially updateable
3. Theoretically not updateable
Wiki User
∙ 12y ago
In a database management system, data can be viewed in three main ways:
- Conceptual view: Represents the overall framework or structure of the entire database.
- External view: Shows a subset of the database and is tailored to meet individual user requirements.
- Physical view: Describes how data is stored on the physical storage media.
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What can use two different views to create a table?
In a database management system, you can use two different views to create a table by performing a union operation on the two views. This will combine the results of the two views into a single virtual table, allowing you to access the data from both views in one unified table.
Difference between database and database instance?
A database is a structured collection of data, while a database instance refers to a single running copy of a database system. Think of a database as the overall system that stores data, and a database instance as a specific iteration of that system currently running in memory.
Difference between user and schema for DB2?
In DB2, a user is an individual who is granted permissions to access and interact with the database, while a schema is a named collection of tables, views, procedures, and other database objects owned by a user. Users are associated with schemas to define their default schema for objects they create.
What is view of data in dbms?
In a database management system (DBMS), a view is a virtual table derived from one or more base tables. It allows users to query or manipulate data without directly accessing the underlying tables, providing a layer of abstraction and security. Views can simplify complex queries, hide sensitive information, and provide a consistent interface to the data.
Distinguish between DBMS and OLAP systems?
DBMS (Database Management System) is software that manages and organizes data in a structured way for efficient storage and retrieval. OLAP (Online Analytical Processing) systems are used for complex data analysis and reporting by providing multidimensional views of data for decision-making purposes. DBMS focuses on data storage and retrieval, while OLAP focuses on data analysis and reporting.
What can use two different views to create a table?
In a database management system, you can use two different views to create a table by performing a union operation on the two views. This will combine the results of the two views into a single virtual table, allowing you to access the data from both views in one unified table.
What is quality management in purchasing and supply management?
supply management views it's quality system and the supplier quality system as two separate systems.
What is meant by the Management theory jungle?
Different approaches or schools of management provide confusing views about the nature and scope of management. Professor Harold Koontz observed the management theory as a jungle.
What is the definition of a database system?
A database system is a way of organizing information on a computer, implemented by a set of computer programs. This kind of organization should offer: * simplicity - an easy way to collect, access-connect, and display information;* stability - to prevent unnecessary loss of data;* security - to protect against unauthorized access to private data; * speed - for fast results in a short time, and for easy maintenance in case of changes in the organization that stores the information. Each subject in the common database is put in a structure or object which is called a "table." The database provides a way to connect or "query" the different subjects depending on the goal of the question. Most of the common databases use a standard query language or "SQL" (although there are less-common kinds of databases that use different ways of accessing the data). The first databases were developed in the early 60s in the US. Most commercial and non-commercial organizations use a database for storing their important information.An ordered collection of information. Usuall this is organized into tables, so you might also define a database as a collection of tables (together with some other, supporting, data structures, such as indices and views, and perhaps some computer code).
Which model represents the end user's view of the database?
the ---- of a database presents the views that the end user have
Functions of schema?
The schema (pronounced skee-ma) of a database system is its structure described in a formal language supported by the database management system (DBMS). In a relational database, the schema defines the tables, the fields, relationships, views, indexes, packages, procedures, functions, queues, triggers, types, sequences, materialized views, synonyms, database links, directories, Java, XML schema's and other elements.Schema's are generally stored in a data dictionary. Although a schema is defined in text database language, the term is often used to refer to a graphical depiction of the database structure.Hope this helps!Inclus - We provide indivdual and coporate trainingsEducate, Learn & Servewww.Inclus.net
What are views n a database system?
Used to view colums and rows
What are different theories in an organization?
Some common theories in organization include classical management theory which focuses on efficiency and hierarchy, contingency theory which posits that there is no one best way to manage, and systems theory which views organizations as complex systems with multiple interrelated parts. Each theory offer different perspectives on how to understand and manage organizations effectively.
Which data management language component enabled the DBA to define the schema components?
Data definition language (DDL) component enables database administrators (DBAs) to define the schema components, including tables, indexes, views, and constraints within a database. With DDL, users can create, modify, and delete the structure of the database to ensure data integrity and organization.
How can a diverse management team benefit a company?
The company decision-makers are given different views,approaches and strategies. Assess which one is feasible.
Why did America have different views about independence?
because they had different views
What is the difference between database and table?
A table is an object inside a database. A database has tables of data, views, indexes and programs. A database can have 10 or thousands of tables. More specifically, a table is a collection (rows) of data on a single related topic. For example, the Employees table would have employee data, each row being a different employee, but it would not have Inventory data. That would be in the Inventory table. A database is a collection of objects, primarily tables, but also indexes to help search the tables, views that filter, select and combine the data in the tables, and stored procedures (pre-defined programs that perform specific actions on the database).
