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...

Mine is Insurance Domain, So interviewer asked about terms like underwriting, disbursement amt, Reinsurance

0 Answers   TCS, Wipro,

with out using update strategy transnsformation how to update the data in mapping level

1 Answers  

I have a source either file or db table Eno ename sal dept 101 sri 100 1 102 seeta 200 2 103 lax 300 3 104 ravam 76 1 105 soorp 120 2 Want to run a session 3 times. First time: it should populate dept 1 Second time: dept 2 only Third time: dept 3 only How can we do this?

2 Answers   TCS,

what is bridge tables in informatica

1 Answers   CTS,

I have 4 columns in a table say, name ,address, salary and city. So based on distinct city names, i need to combine the other data and send it to a flat file. Distinct city names can be 4 or 5 or 6. So it has to dynamically generate flat files(4 or 5 or 6) corresponding to the city names.

2 Answers  

TELL ME ABOUT WORK FLOW SCHEDULING?

3 Answers   TCS,

In a sequential batch can u run the session if previous session fails?

3 Answers  

What are your source in project and how you import in informatica? How can i explain abt this?

1 Answers   Accenture, Unisoft Infotech,

What are the different options used to configure the sequential batches?

2 Answers   Wipro,

Can you start a batches with in a batch?

1 Answers  

how to call lookup qualifer in unconnected look;up

1 Answers   BirlaSoft,

Slowly changing dimensions, types and where will you use them

0 Answers