Answer / eswar

When using incremental aggregation, you apply captured
changes in the source to aggregate calculations in a
session. If the source changes only incrementally and you
can capture changes, you can configure the session to
process only those changes. This allows the Informatica
Server to update your target incrementally, rather than
forcing it to process the entire source and recalculate the
same calculations each time you run the session.

Answer / sivaprasad

Gradually to synchronize the target data with source data,
there are further 2 techniques:-
Refresh load - Where the existing data is truncated and
reloaded completely.
Incremental - Where delta or difference between target and
source data is dumped at regular intervals. Timsetamp for
previous delta load has to be maintained.

Answer / bharat

Incremental aggregation is a technique by which we can
capture the aggregated data incrementally.
for this we have to sort the data before sending it to
aggregator then we have to enable the property incremental
aggregation in the workflow level inside the session.

Answer / rams

using incrimental aggrigation in session level,we calculate the only capture changes data in source,This allows the Informatica Server to update your target incrementally..

Answer / ankit kansal

Incremental Aggregation ->

Incremental Aggregation is a technique to populate data on your aggregated tables or materialized view incrementally.

It takes new incoming data only based upon last updated column value or created_date time stamp column and thus uses its own cache created/updated earlier and updated the table as required.

http://deepinopensource.blogspot.in/

Answer / vas chiky

If suppose, i use a dynamic lookup of target agg table and
an update stategy to update or insert records.. what is the
difference between this and Incremental aggregation ?? why
i need to depend on this Incremental aggregation chk box??

please clear my doubt

Answer / siva

If we choose Incremental Aggregation Informatica will store the cache files permanently.

Answer / raghvendra

incremental aggregation performs aggregation on incremented
data..so based on requirements if we can use incremental
aggregation then definately it will improve performance..so
while develop mapping always keep in mind this factor too...

source name sal aaaa 2000 bbbb 3000 abcd 5000 Target name sal aaaa 2000 bbbb 3000 abcd 5000 total 10000 how to get total as new row and sum as 10000 thanks

4 Answers   Polaris,

How can you increase the performance in joiner transformation?

0 Answers  

There are 4 source files which contains same metadata create target that should display the file name along with record please send answer with mapping

3 Answers   Wipro,

Please create a mapping where I have source which has one column with name like Aman_Gupta Rakesh_Mehra Sachin_More I want the target field should contain the name in reverse order i.e Gupta_Aman Mehra_Rakesh More_Sachin. Can you please tell me what transformation would be needed to do this.

5 Answers  

What happen if you have 3 ports in SQ and 4 ports in SQL override of SQ( provided all ports are in same order and they are connected with proper source and target)? Also what happens when I have 4 ports and will extract 3 values in SQloverride.. What will be the value in 4th port ?

0 Answers   CTS,

How many repositories can be created in informatica?

1 Answers  

what are the settiings that u use to cofigure the joiner transformation?

2 Answers  

How to load query faster,so that It will take less time to load?

1 Answers   BNP Paribas,

Comment on significance of oracle 9i in informatica when compared to oracle 8 or 8i?

1 Answers  

If we have a two tables A & B A contain 10 records,B contain 20 records,what w'll b the o/p if we perform normal join,Master outer join,Detail outer join and Full Outer join how?

1 Answers   TCS,

All active transformations r passive or not?

7 Answers  

what is mean by complex business rule ?

0 Answers   Cap Gemini,