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- Database_schema abstract "A database schema (/ˈski.mə/ SKEE-mə) of a database system is its structure described in a formal language supported by the database management system (DBMS) and refers to the organization of data as a blueprint of how a database is constructed (divided into database tables in case of Relational Databases). The formal definition of database schema is a set of formulas (sentences) called integrity constraints imposed on a database. These integrity constraints ensure compatibility between parts of the schema. All constraints are expressible in the same language. A database can be considered a structure in realization of the database language. The states of a created conceptual schema are transformed into an explicit mapping, the database schema. This describes how real world entities are modeled in the database."A database schema specifies, based on the database administrator's knowledge of possible applications, the facts that can enter the database, or those of interest to the possible end-users." The notion of a database schema plays the same role as the notion of theory in predicate calculus. A model of this “theory” closely corresponds to a database, which can be seen at any instant of time as a mathematical object. Thus a schema can contain formulas representing integrity constraints specifically for an application and the constraints specifically for a type of database, all expressed in the same database language. In a relational database, the schema defines the tables, fields, relationships, views, indexes, packages, procedures, functions, queues, triggers, types, sequences, materialized views, synonyms, database links, directories, XML schemas, and other elements.Schemas 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. In other words, schema is the structure of the database that defines the objects in the database.In an Oracle Database system, the term "schema" has a slightly different connotation.".
- Database_schema thumbnail Mediawiki_database_Schema.svg?width=300.
- Database_schema wikiPageExternalLink bb187299%28SQL.80%29.aspx.
- Database_schema wikiPageExternalLink Tip_2F00_Trick_3A00_-Online-Database-Schema-Samples-Library.aspx.
- Database_schema wikiPageExternalLink Default.aspx.
- Database_schema wikiPageExternalLink data_models.
- Database_schema wikiPageID "345937".
- Database_schema wikiPageRevisionID "602570606".
- Database_schema hasPhotoCollection Database_schema.
- Database_schema subject Category:Data_management.
- Database_schema subject Category:Data_modeling.
- Database_schema comment "A database schema (/ˈski.mə/ SKEE-mə) of a database system is its structure described in a formal language supported by the database management system (DBMS) and refers to the organization of data as a blueprint of how a database is constructed (divided into database tables in case of Relational Databases). The formal definition of database schema is a set of formulas (sentences) called integrity constraints imposed on a database.".
- Database_schema label "Database schema".
- Database_schema label "Databaseschema".
- Database_schema label "Esquema de banco de dados".
- Database_schema label "Esquema de una base de datos".
- Database_schema label "Schema di database".
- Database_schema label "Схема базы данных".
- Database_schema label "スキーマ (データベース)".
- Database_schema sameAs Esquema_de_una_base_de_datos.
- Database_schema sameAs Datu-base_eskema.
- Database_schema sameAs Schema_di_database.
- Database_schema sameAs スキーマ_(データベース).
- Database_schema sameAs 데이터베이스_스키마.
- Database_schema sameAs Databaseschema.
- Database_schema sameAs Esquema_de_banco_de_dados.
- Database_schema sameAs m.03bw_b2.
- Database_schema sameAs Q632285.
- Database_schema sameAs Q632285.
- Database_schema wasDerivedFrom Database_schema?oldid=602570606.
- Database_schema depiction Mediawiki_database_Schema.svg.
- Database_schema isPrimaryTopicOf Database_schema.
