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Data analysis expressions
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Data analysis expressions : ウィキペディア英語版
Data analysis expressions

Data Analysis Expressions, or DAX, is the native formula and query language for Microsoft PowerPivot and SQL Server Analysis Services Tabular models. DAX includes some of the functions that are used in Excel formulas, and additional functions that are designed to work with relational data and perform dynamic aggregation. It is, in part, an evolution of the Multidimensional Expression (MDX) language developed by Microsoft for Analysis Services multidimensional models (often called cubes) combined with Excel formula functions. It is designed to be simple and easy to learn, yet to expose the power and flexibility of PowerPivot and SSAS tabular models.
==Background==
The Data Analysis eXpressions (DAX) language provides a specialized syntax for querying Analysis Services tabular model. DAX is NOT a programming language. DAX is a formula language. You can use DAX to define custom calculations for Calculated Columns and for Calculated Fields (measures) in Analysis Services Tabular Model.

抄文引用元・出典: フリー百科事典『 ウィキペディア(Wikipedia)
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