Explain difference between snow flake and star schema. What are situations where snow flake schema is better than star schema to use and when the opposite is true?

0 Answers  

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Tell me one example for junk dimension?

9 Answers   TCS,

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Hi Guys, I have been to L& T last week ..Please find the questions mentioned below 1)Slowly changing dimension types 2)DML statement 3)DDL statement 4)write a syntax to create database 5) differences between count(*) and count(column) 6) differences between union and union all 7) what is decode 8) what is NVL 9) Arrange the values in ascending order 10,5,20,15,null 10)Primary and surrogate key 11)what is group by clause does? 12)what is difference between truncate and delete 13)what is difference between OLAP and OLTP ? 14)Architecture of Datawarehouse 15)how do you test the data validation from source as (flat file and xml) to staging tables. 16)what is shedule and time bound the mentioned above question asked in two rounds.all the best

2 Answers   L&T,

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Tell me what is degree of a relation?

0 Answers  

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What is difference between Business Objects and Hyperion Essbase? Please help me

1 Answers   Cap Gemini, TCS,

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Code the tables statement for a single-level (most common) frequency?

0 Answers  

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Which are the olap tools available that are supported by oracle?

0 Answers  

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What is a view as it relates to system modeling?

0 Answers  

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what are the major three types of modeling used?

0 Answers   InfoAxon Technologies,

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how to find unique records in informatica level

1 Answers   IBM,

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How to know the time taken for particular report execution?

0 Answers  

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What is a source qualifier?

0 Answers  

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