Data Mining Extensions: Difference between revisions

Revision as of 20:23, 4 April 2018

Revision as of 12:54, 30 June 2018

Line 3:

Like SQL, it supports a data definition language, data manipulation language and a data query language, all three with SQL-like syntax.

Whereas SQL statements operate on relational tables, DMX statements operate on data mining models.

Similarly, SQL Server supports the [[Multidimensional Expressions|MDX]] language for [[OLAP]] databases.

DMX is used to create and train data mining models, and to browse, manage, and predict against them.

DMX is composed of data definition language (DDL) statements, data manipulation language (DML) statements, and functions and operators.

== DMX Queries ==

DMX Queries are formulated using the <code>SELECT</code> statement.

They can extract information from existing data mining models in various ways.

== Data Definitiondefinition language Language==

The [[Datadata Definitiondefinition Languagelanguage]] (DDL) part of DMX can be used to

* Create new data mining models and mining structures - <code>CREATE MINING STRUCTURE, CREATE MINING MODEL</code>

* Delete existing data mining models and mining structures - <code>DROP MINING STRUCTURE, DROP MINING MODEL</code>

Line 18:

* Copy data from one mining model to another - <code>SELECT INTO</code>

== Data Manipulationmanipulation language Language==

The Data[[data Manipulationmanipulation Languagelanguage]] (DML) part of DMX can be used to

* Train mining models - <code>INSERT INTO</code>

* Browse data in mining models - <code>SELECT FROM</code>

* Make predictions using mining model - <code>SELECT ... FROM PREDICTION JOIN</code>

== Example: a prediction query ==

This example is a singleton prediction query, which predicts for the given customer whether she will be interested in home loan products.

<source lang="tsql">

Line 33:

[Decision Tree]

NATURAL PREDICTION JOIN

(SELECT

35 AS [Age],

'Y' AS [House Owner],

Line 44:

</source>

== See also ==

*[[XML for Analysis]]

== External links ==

*[http://msdn2.microsoft.com/en-us/library/ms132058.aspx Data Mining Extensions (DMX) Reference], (at [[MSDN]])