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What is the main difference between a Joiner Transformation
and Union Transformation?
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Answer / raj
Join Transformation combines data record horizontally based on
join condition.
And combine data from two different sources having different metadata.
Join transformation supports heterogeneous, homogeneous data source.
Union Transformation combines data record vertically from multiple sources, having same metadata.
Union transformation also support heterogeneous data source.
Union transformation functions as UNION ALL set operator
| Is This Answer Correct ? | 30 Yes | 2 No |
Answer / medatati satya teja ravi kiran
UNION:1)we can create multiple input groups,but only one
out put group
2)we can connect heterogeneous sources to a union
transformation
3)The union tf does not remove duplicate rows.To remove
duplicte rows, we must add another tf such as router or
filter tf
JOIN:1)Used to join source data from two related
hetorogeneous sources residing in different locations or we
can join data from the same source
2)The joiner tf remove duplicate rows...
| Is This Answer Correct ? | 8 Yes | 3 No |
Answer / ash.gadgi
Joiner Transformation merge horizontally
Union Transformation merge vertically
| Is This Answer Correct ? | 13 Yes | 9 No |
Answer / yaseen
we can create multiple input groups,but only one
out put group
Union Transformation combines data record vertically from multiple sources, having same metadata.
The structure and Data types should be same while using Union transformation
Join Transformation combines data record horizontally based on
join condition.
| Is This Answer Correct ? | 1 Yes | 0 No |
Answer / swapna
A joiner Transformation is used to join data from
hertogenous database ie (Sql database and flat file )
where has Union transformation is used to join data from
the same relational sources.....(oracle table and another
Oracle table )
| Is This Answer Correct ? | 10 Yes | 32 No |
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4 Answers Accenture, Cap Gemini,
What is the main difference between a Joiner Transformation and Union Transformation?
Teradata 
