DW Handbook
This page shows the name of the construct, its description
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Attribute
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Value
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Name
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Reduce Dimensions
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Description
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None
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Function
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None
|
|
Aim
|
Allow a data engineer (user) to reduce dimensions of a relation horizontally or vertically
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|
Context
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None
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Rationale
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None
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Mechanisim
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None
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|
Formalisim
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None
|
|
Relational Algebra (RA)
|
Similar to RA operation
Select(σ)+Project (π)
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|
Type
|
Composite
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|
Class
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Unary
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|
Transformation_category
|
1:1
|
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Inputs
|
| Inputs | Number of input datasets |
|---|
| None | 1 |
|
|
Outputs
|
| Outputs | Number of output datasets |
|---|
| None | 1 |
|
|
Used in stage(s)
|
Structuring2
|