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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?
In general, a database is a collection of related data. In more specific terms, a database is typically a collection of computer files, usually stored on disk, used to contain and manage this data. The logical structure of a database (as organized in tables, indexes, views, etc.) does not necessarily correspond directly to its physical structure (the data files, transaction log files, etc.). A database instance is the instantiation of memory structures and processes by a database management system manages the logical and physical structures and the data organized and stored therein. An application program must connect to and interact with the database instance in order to insert, retrieve, modify, and/or delete data stored in the database.
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.
What is DDL in databases?
DDL stands for Database Definition Language. It is a language used to create a database. Most databases have a language that will do this. Normally it is a form of SQL (Structured Query Language).DDL stands for Database Definition Language. It is a language used to create a database. Most databases have a language that will do this. Normally it is a form of SQL (Structured Query Language).DDL stands for Database Definition Language. It is a language used to create a database. Most databases have a language that will do this. Normally it is a form of SQL (Structured Query Language).DDL stands for Database Definition Language. It is a language used to create a database. Most databases have a language that will do this. Normally it is a form of SQL (Structured Query Language).DDL stands for Database Definition Language. It is a language used to create a database. Most databases have a language that will do this. Normally it is a form of SQL (Structured Query Language).DDL stands for Database Definition Language. It is a language used to create a database. Most databases have a language that will do this. Normally it is a form of SQL (Structured Query Language).DDL stands for Database Definition Language. It is a language used to create a database. Most databases have a language that will do this. Normally it is a form of SQL (Structured Query Language).DDL stands for Database Definition Language. It is a language used to create a database. Most databases have a language that will do this. Normally it is a form of SQL (Structured Query Language).DDL stands for Database Definition Language. It is a language used to create a database. Most databases have a language that will do this. Normally it is a form of SQL (Structured Query Language).DDL stands for Database Definition Language. It is a language used to create a database. Most databases have a language that will do this. Normally it is a form of SQL (Structured Query Language).DDL stands for Database Definition Language. It is a language used to create a database. Most databases have a language that will do this. Normally it is a form of SQL (Structured Query Language).
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 are the different philosophies of management?
The main philosophies of management include classical management, which emphasizes efficiency and productivity through structured hierarchies; human relations management, which focuses on employee welfare and motivation; and systems management, which views organizations as interconnected systems that require holistic approaches. Additionally, contingency management considers the situational factors that influence management decisions, while transformational leadership emphasizes inspiring and motivating employees to achieve change. Each philosophy offers unique insights into effective management practices.
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
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 are the 4 major approaches of management?
The four major approaches to management are classical management, behavioral management, quantitative management, and systems management. Classical management focuses on efficiency and productivity through structured tasks and organizational hierarchy. Behavioral management emphasizes the human aspect of work, highlighting motivation and team dynamics. Quantitative management utilizes statistical and mathematical techniques to inform decision-making, while systems management views organizations as interconnected systems, focusing on how various components interact and affect overall performance.
What is object in dbms?
In a Database Management System (DBMS), an object refers to a distinct entity that can be stored, manipulated, or managed within the database. Common examples of database objects include tables, views, indexes, stored procedures, and schemas. Each object serves a specific purpose, facilitating data organization, retrieval, and integrity within the database environment. Objects are essential for structuring data and enabling efficient database operations.
What presents information about the database object the progress of current tasks and the status of certain commands and keys?
The database object that provides information about the progress of current tasks and the status of certain commands and keys is typically referred to as a "system view" or "system catalog." In many database management systems, such as SQL Server or PostgreSQL, these system views contain metadata that tracks ongoing processes, command execution status, and resource utilization. They allow administrators and users to monitor performance and troubleshoot issues effectively.
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 is a three schema architecture?
The three-schema architecture is a framework for database systems that separates the user's view of the data from the physical storage. It consists of three levels: the internal schema, which defines how data is physically stored; the conceptual schema, which represents the logical structure of the entire database; and the external schema, which defines how users interact with the data through various views. This separation helps in data abstraction, data independence, and allows for easier management and integration of data.
