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Categories >> Software >> Data Warehouse >> Informatica


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How to delete duplicate record in Informatica?
 Question Submitted By :: Informatica
I also faced this Question!!     Answer Posted By  
# 1
if the source is database means we can delete the duplicate
records by enabling the option select distinct in source
qualifier t/r properties or by writing the following query
in source qualifier filter

delete from emp where rowid not in (select min(rowid) from
emp group by empno);

if the source is flat file means by enabling the option
distinct in sorter t/r we can delete the duplicate records
Is This Answer Correct ?    22 Yes 1 No
# 2
Select ditinct in properties of source qualifier
Is This Answer Correct ?    20 Yes 6 No
# 3
Source and the target will the same table from which the
duplicate needs to be deleted from. Then use a lookup trans
on to this same table and then use an update trans with
DD_DELETE if the row is duplicate else do nothing.
Is This Answer Correct ?    11 Yes 2 No
Infa Dev
# 4
There are 2 ways to do this and both of them are efficient.
Method 1: Sorter -Filter.
Send all the data to a sorter and , sort by all feilds that
u want to remove duplicacy from . note that in the
preoperties tab, select Unique .
This will select and send forward only Unique Data .

Method 2; Use an Aggregator
Use AGG Transformation and group by the keys /feilds that u
want to remove duplicacy from.
Is This Answer Correct ?    10 Yes 2 No
Julius Caeser
# 5

how to delete duplicate values from table if source and
target are same

my Question is which logic we need to apply before using
DD_DELETE option in update strategy ?

Do we require to use aggregator to group the values and if
there count > 1 then DD_DELETE

PLZ reply
Is This Answer Correct ?    0 Yes 1 No
# 6
create table newtable as select distinct * from original
by doing this we can elimate the duplicate rows
Is This Answer Correct ?    6 Yes 9 No

Other Informatica Interview Questions
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how to design mapping half of source table records into one target and remaining half into another target ABC 8
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how to get the data from the client machine and how to get server location data to client loction can any one explain bit deep please..! TCS 3
Design a mapping to get year of join for each employee. Accenture 3
As a support project team member, how will you get the questions regarding errors from client or customers (in which format)?   1
how can we calculate fact table size?   1
how to declare array in plsql?   1
following source name gender ramya female ram male deesha female david male kumar male i want the target male female ram ramya david deesha kumar any body give solution above question? TCS 4
What is polling?   1
What is active and passive transformation?   10
What are the different types of Type2 dimension maping?   1
How to get EVEN & ODD numbers separately?   8
For more Informatica Interview Questions Click Here 

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