Interested to Buy Any Domain ? << Click Here >> for more details...
How Union Transformation is an Active Trans?
- 6 Answers
- 20303 Views
- I also Faced
- E-Mail Answers
Answers were Sorted based on User's Feedback
Answer / priyank
First of all union transformation allows duplicate ddata to
pass through. Now say we have n input groups and there are
m records coming from them. In the output group all the m
records will go through.
For a transformation to be an Active transformation, it has
to satisfy either of the below 3 conditions:
1. no of i/p <> no of o/p
OR
2. row type of the input row changes.
OR
3. Transaction scope of the input rows changes.
For union transformation as discussed above , it satisfies
the 1st and the 2nd condition. But the order in which the
input is passed through the union transformation is not
fixed as in the first record to pass through the
transformation can be from the nth source and the last
record can be from the 1st source. So here the transaction
scope of the input rows changes and hence Union
transformation is an Active transformation.
| Is This Answer Correct ? | 5 Yes | 0 No |
Answer / hardeep
The Union transformation is a multiple input group transformation that you can use to merge data from multiple pipelines or pipeline branches into one pipeline branch. Using the Union transformation to merge data from multiple sources is similar to using the UNION ALL SQL statement to combine the results from two or more SQL statements. Similar to the UNION ALL statement, the Union transformation does not remove duplicate rows.
You can connect heterogeneous sources to a Union transformation. The Union transformation merges sources with matching ports and outputs the data from one output group with the same ports as the input groups.
| Is This Answer Correct ? | 5 Yes | 3 No |
Answer / ravi
hi all please post relevant answers the question is why
union transformation is active transformation
not the properties of union transformation
| Is This Answer Correct ? | 1 Yes | 0 No |
Answer / krishraj
It is simple logic, UNION fectches the commmon records
between two tables and it emliminated un-common records. So
it will be Active transformation which means it will change
the number of records.
Any other answers please....
| Is This Answer Correct ? | 1 Yes | 38 No |
The simple ligic of Union is that, It capture all the
unique recorde from bothe the source.
suppose if you have 10 records in table A and 10 records in
table B, in which 3 records are same in both the tables.
Then after using the Union transformation you will get 17
records, as the rescords which are getting duplicated will
not be in the output.
| Is This Answer Correct ? | 5 Yes | 47 No |
How does the session recovery work.
Hello , I am unable to work with SQL transformation at least. Where do i need to give connection for sql transformaton ? At session level there is no property . I have created a SQL Transformation and chosen query mode. But do i need to pass connection information to it ? I don't know where do i need to write a query ? I have written a query in file and that file path i gave in the properties of SQL Transformation. But it is not working. Could any one of you please let know how can i work with SQL Transformation? Advance Thanks.
Explain the tuning lookup transformation - informatica
I am Unable to load the FixedWith FlatFile Into The Target.What Is The Reason. PLZ Help Me..
wt is inline view? when and why we Use ?mail to rayallarv@gmail.com
After a load is done to my target table, I need to insert a last row, which might be formed at some expression transformation and brought to target. Do I have to have separate mapping to be run after the 1st mapping? Or in a single mapping how to achieve this?
what is lookup ?
what is metadata?
I'd like the load to be triggered by client. By placement of a file or somehow. How is it done in Informatica? I'm using version 7.1.4 This is so urgent - I really appreciate your help :-)
3 Answers Alcatel-Lucent, ECI Telecom,
What is the difference Between Mapping parameter and variable
What are the performance considerations when working with aggregator transformation?
What is workflow monitor?
Teradata 
