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Что (кто) такое Data Definition Language - определение
SYNTAX FOR DEFINING DATA STRUCTURES IN A DATABASE
Drop (SQL); Create (SQL); Alter (SQL); Create (sql); CREATE (SQL); Data Description Language; Data definition; Create sql; Drop sql; Data Definition Language; Sql drop; Drop database; Data definition language (SQL)
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Data definition language
<language, database> (DDL)
1. A language enabling the structure and instances of a
database to be defined in a human-, and machine-readable
form.
SQL contains DDL commands that can be used either
interactively, or within programming language source code,
to define databases and their components, e.g. CREATE and
DROP.
See also Data manipulation language (DML).
2. A specification language for databases, based on the
entity-relationship model. It is used in the Eli
compiler-compiler to manage type definitions.
["DDL Reference Manual", ECE Dept U Colorado, 1991 ].
(1999-04-26)
Data Manipulation Language
FAMILY OF SYNTAX ELEMENTS USED FOR SELECTING, INSERTING, DELETING AND UPDATING DATA IN A DATABASE
Data Manipulation Language
<language, database> (DML, or Data Management Language) A
language for the manipulation of data in a database by
applications and/or directly by end-users.
SQL contains DML commands such as INSERT, UPDATE, and
DELETE.
See also Data Definition Language (DDL).
(1999-04-26)
Data Language Interface
DATABASE LANGUAGE
IBM Data Language One (DL/1); Data Language/1; DL/I; DL/1
Data Language Interface (Data Language/I, DL/I, Data Language/Interface, Data Language/One) is the language system used to access IBM's IMS databases, and its data communication system.
DL/I
DATABASE LANGUAGE
IBM Data Language One (DL/1); Data Language/1; DL/I; DL/1
The data manipulation language of IMS.
DL/1
DATABASE LANGUAGE
IBM Data Language One (DL/1); Data Language/1; DL/I; DL/1
Query language, linear keyword.
Clinical case definition
CLINICAL CRITERIA BY WHICH PUBLIC HEALTH PROFESSIONALS DETERMINE WHETHER A PERSON'S ILLNESS IS INCLUDED AS A CASE IN AN OUTBREAK INVESTIGATION
Case Definition; Clinical definition; Case definition; Clinical disease
In epidemiology, a clinical case definition, a clinical definition, or simply a case definitionhttp://www.atsdr.
Data exchange
PROCESS OF TAKING DATA STRUCTURED UNDER A SOURCE SCHEMA AND TRANSFORMING IT INTO DATA STRUCTURED UNDER A TARGET SCHEMA
Data exchange language; Data exchange format; Data interchange
Data exchange is the process of taking data structured under a source schema and transforming it into a target schema, so that the target data is an accurate representation of the source data.A.
The Open Definition
![The [[Open content]] logo](https://commons.wikimedia.org/wiki/Special:FilePath/Open Content blue.svg?width=200 "The [[Open content]] logo")
TEXT DEFINITION OF THE TERM 'OPEN' IN THE CONTEXT OF OPEN CONTENT AND OPEN DATA
Open Definition
The Open Definition is a document published by the Open Knowledge Foundation (OKF) (previously Open Knowledge International) to define openness in relation to data and content. It specifies what licences for such material may and may not stipulate, in order to be considered open licences.
Standard-definition television
ORIGINAL ANALOG TELEVISION SYSTEMS
Standard Definition TV; SDTV; Standard definition television; Standard Definition Television; Standard-definition; Standard definition; Standard Definition; SD video; 🅌; Standard-definition TV; Standard-definition video; SD digital television; SD digital; Standard-definition digital television; Standard-definition digital format; Medium-definition television
Standard-definition television (SDTV, SD, often shortened to standard definition) is a television system which uses a resolution that is not considered to be either high or enhanced definition. "Standard" refers to it being the prevailing specification for broadcast (and later, cable) television in the mid- to late-20th century, and compatible with legacy analog broadcast systems.
recursive definition
![Four stages in the construction of a [[Koch snowflake]]. As with many other [[fractal]]s, the stages are obtained via a recursive definition.](https://commons.wikimedia.org/wiki/Special:FilePath/KochFlake.svg?width=200 "Four stages in the construction of a [[Koch snowflake]]. As with many other [[fractal]]s, the stages are obtained via a recursive definition.")
DEFINING THE ELEMENTS IN A SET IN TERMS OF OTHER ELEMENTS IN THE SET
Inductive definition; Recursively define; Recursively defined
See recursive definition.
Википедия
Data definition language
In the context of SQL, data definition or data description language (DDL) is a syntax for creating and modifying database objects such as tables, indices, and users. DDL statements are similar to a computer programming language for defining data structures, especially database schemas. Common examples of DDL statements include CREATE, ALTER, and DROP.
