What are the various tools? Explain name a few?

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Explain why are oltp database designs not generally a good idea for a data warehouse?

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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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What are the various methods of getting incremental records or delta records from the source systems?

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What is IQD file?

1 Answers  

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How to use the tool Ontobulider

1 Answers  

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Explain what is the data type of the surrogate key?

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Explain what are the mapping paramaters and maping variables?

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How are the dimension tables designed?

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How to test report in reportnet?

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how to find unique records in informatica level

1 Answers   IBM,

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Explain Association algorithm in Data mining?

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