Search results
Results from the WOW.Com Content Network
In computing, a database is an organized collection of data or a type of data store based on the use of a database management system (DBMS), the software that interacts with end users, applications, and the database itself to capture and analyze the data. The DBMS additionally encompasses the core facilities provided to administer the database.
The database schema is the structure of a database described in a formal language supported typically by a relational database management system (RDBMS). The term " schema " refers to the organization of data as a blueprint of how the database is constructed (divided into database tables in the case of relational databases ).
These snippets of SQL code can address external data sources through the use of ODBC connections on the local machine. This enables users to interact with data stored outside the Access program without using linked tables or Jet. [44] Users construct the pass-through queries using the SQL syntax supported by the external data source.
The external schemas describe the different external views of the data, and there may be many external schemas for a given database. The conceptual schema describes all the data items and relationships between them, together with integrity constraints (later). There is only one conceptual schema per database.
Energy Science and Technology Database, maintained by the United States Department of Energy; Estradiol dibenzoate, an estrogen ester; Ethylene dibromide; Extensor digitorum brevis muscle; External data bus: The primary data highway of all computers. Everything in a computer is tied either directly or indirectly to the external data bus.
An open-access database of Latin and Ancient Greek dictionaries Free University of Chicago: Mendeley [63] Multidisciplinary: N/A Crowdsourced database of research documents. Over 100M documents uploaded by the researchers plus data from repositories (e.g. PubMed and arXiv) Free & Subscription Elsevier: National Criminal Justice Reference Service
The external level is exposed to users and developers and supplies a consistent pattern for performing database operations. [ 3 ] Database operations are represented only loosely as SQL or even database access at this level.
3 External links. Toggle the table of contents ... This is a comparison of notable object database management systems, showing what fundamental object database ...