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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 2 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
 
I have 1200 records how can u send it in aggregator with good performance issues?   3
What is data merging, data cleansing and sampling? Satyam 5
What is the main difference between a Joiner Transformation and Union Transformation?   5
Is it possible to update the target table with PK? TCS 1
WHAT IS UPDATE OVERRIDE . DIFFERENCE BETWEEN SQL OVERRIDE AND UPDATE OVERRIDE ? Target 7
I have 5 sessions s1,s2,s3,s4 & s5 and i want execute s1,s2,s3,s5 after s4. How? DELL 8
Where is the cache stored in informatica? Infosys 5
Target is zero file and how can you send the email? Bank-Of-America 2
how do u move the code from development to production?   3
how to calculate the optimum cache size in aggregator transformation?   1
What are the Differences between static cache and dynamic cache?   1
I cleared Informatica certification Designer. if anybody need dumps, can contact at mukesh1009@gmail.com   43
 
For more Informatica Interview Questions Click Here 
 
 
 
 
 


   
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