Major difference between SQL override and Lookup Sql override



Major difference between SQL override and Lookup Sql override..

Answer / ysindhureddy77@gmail.com

1. SQL Override is to limit the number of incoming rows entering the mapping pipeline
Lookup Override is to limit the number of lookup rows to avoid the whole table scan by saving the lookup time & cache it uses.

2. Lookup Override uses "Order By" clause by default
SQL Override doesn't uses it & should provide in our query if we require it.

3. SQL Override can provide any kind of join by writing the query
Lookup Override provides only Non-Equi joins

4. Lookup Override gives only one record even if it finds multiple records for a single condition
SQL Override doesn’t do that.

Is This Answer Correct ?    0 Yes 0 No

Post New Answer

More Informatica Interview Questions

write a query to follwoing table amount year quarter 254556 2003 first 546332 2003 second 129034 2003 third 490223 2003 fourth 165768 2004 first 265443 2004 second 510412 2004 third 435690 2004 fourth i want the output year q1_amount q2_amount q3_amount q4_amount 2003 254556 546332 129034 490223 2004 165768 265443 510412 435690

2 Answers   TCS,


What is decode in informatica?

0 Answers  


how can we load starting with 11th record of a table from source to target

6 Answers   IBM,


lookup is passive y can't it be active? let us say i have some records in my source like 101,rohit,1000 101,rohit,1000 102,kumar,2000 like wise now as it is having multiple matches i return only first,last value it can't return bouth the values that means lookup is acting as select distinct right by default what means it is active?

5 Answers   IBM,


i have flat file it contains 'n' number of records, i need to send half of the records to one target table and Remaining half to another target table. can any tell me procedure.

2 Answers   TCS,


what is size of u r database?

0 Answers  


comonly how meny mappings r there in Banking projects?

1 Answers  


I have been working in Informix-4gl for the past 2 years in an MNC company.But I'm interested to work in Business Intelligence tools. Is it possible to change the technology now? I'm really confused, please help me

1 Answers  


What is a sequence generator transformation?

0 Answers  


What are the different versions of informatica?

0 Answers  


What is meant by lookup transformation? Explain the types of lookup transformation?

0 Answers  


can anyone explain me about retail domain project in informatica?

0 Answers   Zensar,


Categories