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Presentation transcript:

data definition language

Data Mining Extensions - Data Definition Language 1 The Data Definition Language (DDL) part of DMX can be used to

Data definition language - History 1 The data definition language concept and name was first introduced in relation to the Codasyl database model, where the schema of the database was written in a language syntax describing the records, fields, and sets of the user data model

Data Definition Language 1 A 'data definition language' or 'data description language' ('DDL') is a syntax similar to a computer programming language for defining data structures, especially database schemas.

Data Definition Language - History 1 The data definition language concept and name was first introduced in relation to the Codasyl database model, where the schema of the database was written in a Syntax (programming languages)|language syntax describing the Record (computer science)|records, Field (computer science)|fields, and Set (abstract data type)|sets of the user data model

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