Data Warehouse Interview Questions
Questions Answers Views Company eMail

I have 1 crore record in my table and I have to load 25 L in 1st target,25L in 2nd target and 25L in 3rd target? I am new to Informatica,can anybody suggest me the idea?

2 3531

How to load query faster,so that It will take less time to load?

BNP Paribas,

1 3021

rank() over (partition by opt2.dim_plat_site_id, opt2.dim_site_opt_sid order by case when opt2.dm_market_flg in ('Y', 'U') then 1 else 2 end, lkp.contact_rank) as rank1, case opt2.contact_type when 'Buyer' then row_number() over (partition by opt2.dim_plat_site_id, opt2.dim_site_opt_sid, lkp.contact_rank order by has_name_flg desc, ship_to_flg desc , last_order_dt desc) when 'Decision Maker' then row_number() over (partition by opt2.dim_plat_site_id, opt2.dim_site_opt_sid, lkp.contact_rank order by has_name_flg desc , last_quote_dt desc , mailability_score desc , source_ranking desc) when 'Influencer' then row_number() over (partition by opt2.dim_plat_site_id, opt2.dim_site_opt_sid, lkp.contact_rank order by has_name_flg desc, mailability_score desc, source_ranking desc) when 'Payer' then row_number() over (partition by opt2.dim_plat_site_id, opt2.dim_site_opt_sid, lkp.contact_rank order by has_name_flg desc, mailability_score desc, source_ranking desc) --elu 05/28/2013 else row_number() over (partition by opt2.dim_plat_site_id, opt2.dim_site_opt_sid, lkp.contact_rank order by has_name_flg desc, mailability_score desc, source_ranking desc) end rank2 row_number() over (partition by opt3.dim_plat_site_id, opt3.dim_site_opt_sid order by rank1,rank2) as "rank", case when "rank"<= opt3.maximum_value then 'Y' else 'N' end as include_flg

1534

Using Informatica Visio to generate mappings. I am getting error "Table Definition Not Found Exception Error" while importing the template.

1 3091

Hi, can anyone plz share the project architecture for etl testing(banking domain) plz explain the architecture .

Cap Gemini,

2573

can u anyone plz share some etl testing interview question . and share the sql queries and unix . plz help me to clear in the etl testing interview by sharing ur knowledge

Cap Gemini,

1312

Hi can anyone write query for the below input and output Table 1 col 1 100 Null 200 300 Table 2 col1 Null 400 700 800 o/p 200 700 800 2)sql col 1 contains 23x-5-45 26x-12-45 28x-10-50 o/p middlevalue should be greater than 10

Cap Gemini,

1150

case and like function in informtica (my source is XML). case when OS Like'%Windows%' and OS Like '%200%' then 'Windows 200' case when OS Like'%Windows%' and OS Like '%200%'and OS like '%64%' then 'windows 200 64 bit' etc.,,

1 1981

3.User1 doveloped some report,user2 modify the same report and user 3 also updates in that same report? how to identify that report will be modified or not?

IBM, Thomson Reuters,

1 2868

how do we write scripts in unix how to execute scripts in real time anybody please needfull or give me number i will cal u

1284

scenario: dept_no emp_nem 10 A, 10 B, 10 C, 10 D, 20 P, 20 Q, 20 R, 20 S output: dept_no emp_nem 10 A, 10 AB, 10 ABC, 10 ABCD, 20 ABCDP, 20 ABCDPQ, 20 ABCDPQR, 20 ABCDPQRS

1 3853

replace multiple spaces with single space.

IBM,

3 5292

How to get rid of non ascii characters in a string? Ex:- United States Microsoft Visual Studio Tools for Applications 2012 x86 主控支援 - 繁體中文語言套件 to United States Microsoft Visual Studio Tools for Applications 2012 x86.

CTS,

1 2950

How to cast date "2015-03-03-012204-000000" to timestamp

Cognizant,

1 3401

Hi,by usining ptf how we have to combine (likr merge)10 datasets at a time in the oracle database(and write a macro code also)?Like this i have a douts a lot if you dont mind may please send one text mail for me(madhusudhanap16@gmail.com)?

1216


Un-Answered Questions { Data Warehouse }

what are the flaws of chore start time?

5


What would be the value of month at the end of data step execution and how many observations would be there?

583


Explain the teradata primary index mechanics in detail with a diagram.

571


What would you change about your job?

1929


What is a router transformation?

634






What is maximum number of rows and cols can be handled in SAS?

857


What is a rollup component?

633


What is ab initio enterprise meta>environment (eme)?

893


how to prepare the documentation in business objects and where to get the requirement?

1789


What parallelisms does Abinitio support?

732


Hi, I want to change date type char value integer value? I tried alter table tab_name modify (newcolumn newdatetype). But The columns have 10 million values(char type) so I want to load now numeric data. How it is possible? Old Values New Value(I want to load numeric data but the old value should be there in the column) Y 1 N 0 ERROR at line 1: ORA-01439: column to be modified must be empty to change datatype Please help on this. Thanks, GM

3455


Differentiate between operational datastage (ods) and data warehouse?

678


What is the difference between %local and %global? : sas-macro

673


What is the purpose of cluster analysis in data warehousing?

567


Explain PDL with an example?

818