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Categories >> Software >> Data Warehouse >> Informatica
 
 


 

 
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Question
How to delete duplicate record in Informatica?
 Question Submitted By :: Informatica
I also faced this Question!!     Answer Posted By  
 
Answer
# 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
Suresh
 
Answer
# 2
Select ditinct in properties of source qualifier
transformation.
 
Is This Answer Correct ?    20 Yes 6 No
Mayuri
 
 
 
Answer
# 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
 
Answer
# 4
Hi
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
 
Answer
# 5
Hi,

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
Mayuresh
 
Answer
# 6
create table newtable as select distinct * from original
tablename;
by doing this we can elimate the duplicate rows
 
Is This Answer Correct ?    6 Yes 9 No
Sarvesh
 

 
 
 
Other Informatica Interview Questions
 
  Question Asked @ Answers
 
what happens when a batch fails?   3
what is flat file override? Cap-Gemini 1
how will compare two mappings in two different repository? TCS 2
suppose we have 1 to 10 records.In router transformation we had given two condition A>= 5 A<=5 then what will be the output? emc2 2
Change Data Capture in Informatica,using Incremental Aggregation.How can i identify the these data in Target table.   2
how u know when to use a static cache and dynamic cache in lookup transformation. Accenture 9
What is batch and describe about types of batches?   2
which one is costliest transformation? costliest means occupying more memory. which one Aggregator,sorter,filter,etc.. TCS 7
How will you check the bottle necks in informatica? From where do you start checking? HCL 3
ONE FLAT FILE IS THERE WHICH IS COMMA DALAMETED . HOW TO CHANGE THAT COMMA DELEMITER TO ANY OTHER AT THE TIME OF RUNNING ? HP 3
on a day i load 10 rows in my target and on nextday i get 10 more rows add to my target but out of 5 are update row how ican send them to target?how i can insert and update the records Fidelity 4
What are the different threads in DTM process?   1
 
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