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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)
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.
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.
