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 3495

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

BNP Paribas,

1 2998

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

1520

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

1 3068

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

Cap Gemini,

2554

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,

1299

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,

1140

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 1954

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 2849

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

1272

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 3822

replace multiple spaces with single space.

IBM,

3 5242

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 2925

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

Cognizant,

1 3366

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)?

1197


Un-Answered Questions { Data Warehouse }

Hi I'm using data federator.I would like to know if it allows select statment in where clause.For example: SELECT Employee, company, orgunit FROM TAB_BIG WHERE employee IN (Select TAB_SMALL.employee FROM TAB_SMALL WHERE flag = X ) bye

1424


On which Dimension Table you implemented SCD Type in your Project

1564


How many clustered indexes can you create for a table in dwh? In case of truncate and delete command what happens to table, which has unique id 347 what is hybrid slowly changing dimension?

534


can metadata be manually edited? If yes, how?

598


What are differences between teradata and ansi session modes in teradata?

615






How does the aggregator transformation handle null values?

689


When do we go for the tools in the market?

540


Explain attribute?

537


How do you create tables? Exact syntax, and create profiles, users in teradata?

547


how to connect source to db?generally what r stages u used? how to find the data is having delimiter format?

1910


what is intially documentation in sas?

4317


Define the cognos reporting tool?

540


What are the programs that we can do with the microstrategy architect?

558


What is the extension of file to save template?

567


can u any challenge your project?

1594