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Data Warehouse Interview Questions
Questions Answers Views Company eMail

My Source qualifier has empno, sal. Now my mapping is like SQ(EMPNO)->AGGR->EXP->TARGET SAL ------------>TARGET ? means only one source qualifier has 2 columns like empno, sal. connected to same target as shown in above mapping.Is this mapping valid or any issues are there if we design like this?

Span Systems,

2 5153

how to design mapping half of source table records into one target and remaining half into another target

ABC,

8 15396

there is a product table prodid prodname price 100 cinthol 10 101 hamam 10 102 neem 20 103 cake 30 in the above table the price of some products are duplicated and some product prices are distinct we want to push the duplicated prices to one target and non-duplicated prices to other target without using expression and sequence generator transformation

4 6959

performance wise which one is better in joiner and lookup transformation?why?explain clearly?

IBM,

4 21486

There is a table with emp salary column how to get the fields belongs to the salary greater than the average salary of particular department. Write a query

IBM,

7 12740

My source has 100 records. I have targets say in number 5. all target tables has parent and child relationships in between themselves. Now I want to load all 100 records into all targets. How U can ensure that record inserted in parent and then loaded into child.

Cognizant,

3 9552

How your source files are coming to your ETL server. Actually at which stage of your mapping it is happen.

Cognizant,

1 7110

Why Info School? BUILD YOUR CAREER WITH RIGHT GUIDANCE AND SUPPORT

2125

I've a denormalized table EMP(empno,ename,phone,addr1,addr2,fax,email). Now I want to insert the record into target in the format that, there will be 2 target rows for 1 source record. In target the row needs to be inserted as: ROW1: empno,ename,addr1,phone ROW2: empno,ename,addr2,fax,email And I'm not allowed to normalize transformation. How to achieve?

IBM,

1 4772

Input is like 1 1 1 2 2 3 and out put should be 1 2 3 How can u acheive using rank transformation ??

IBM,

3 8868

What is the default join strategy in Teradata???

IBM,

5 25441

Can we have two time dimensions in a schema(either star or snow flake)? For ex if we want joining date of employee and if we want today's sales with time whether can we have two time dimensions for accommodating above tasks?

IBM,

2140

In my source i have 10 records but i want 11 records in target. How can i acheive this in Server jobs.

IBM,

2 7793

there is a product table prodid prodname price 100 cinthol 10 101 hamam 10 102 neem 20 103 cake 30 in the above table the price of some products are duplicated and some product prices are distinct we want to push the duplicated prices to one target and non-duplicated prices to other target without using expression and sequence generator transformation

3 6502

lookup transformation with screenshots

TCS,

4014


Un-Answered Questions { Data Warehouse }

Explain what is the advantages data mining over traditional approaches?

1037


How do you define Teradata?

1046


Suppose we have some 10,000 odd records in source system and when load them into target.how do we ensure that all 10,000 records that are loaded to target doesnt contain any garbage values?

937


As union transformation gives UNION ALL output, how you will get the UNION output?

1120


What is the difference between absolute filtering and standard filtering in microstrategy?

990


What versions of SAS have you used (on which platforms)?

1527


What is spool space and when running a job if it reaches the maximum spool space how you solve the problem?

1121


how to do user inputs and command line arguments in sas?

3062


Explain the advantages of raid 1, 1/0, and 5. What type of raid setup would you put your tx logs.

915


What are the enhancements made in datastage 7.5 compare with 7.0?

1157


Explain the hierarchies level data warehousing.

899


Does microstrategy web support clustering via cisco local router or any other third-party clustering software?

1002


What is an object prompt?

1037


Give e an example of..

2348


Explain the difference between informat and format with an example.

1181