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what are the different Reporting and ETL tools available in
the market?
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Answer Posted / katelynthomas
ETL Tool is used to get data from many source system like RDBMS, SAP, etc. and convert them based on the user requirement. It is required when data float across many systems. Abinitio,DataStage, Informatica, Cognos Decision Stream, etc
ETL is extraction , transforming , loading process the steps are :
1 – define the source
2 – define the target
3 – create the mapping
4 – create the session
5 – create the work flow
ETL Tool is used for extracting data from the legecy system and load it into specified database with some processing of cleansing data.
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When do we analyze the tables? How do we do it?
how does the server recongnise the source and target databases.Elaborate on this
can Informatica be used as a cleansing tool? If yes, give examples of transformations that can implement a data cleansing routine.
explain the methodology of Data Warehousing?(Polaries)
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What are cubes and olap cubes?
Explain what is etl process? How many steps etl contains explain with example?
Give a way in which u can implement a real time scenario where data in a table is changing and u need to look up data from it.How will u configure the look up transform for this purpose?
Which transformation we use to convert 'NA' to 'Not Available'
What do you understand by active and passive transformations?
what happens if the info.server doesn't find the session parameter in the parameter file?
What is etl process?
What is a lookup table in etl?
diff b/w dwh & data mart diff b/w star schema & snow flake schema diff b/w fact table & dimension table what are the contents in requirement specification what are the docs needed for testing draw ur proj architecture
two sources S1,S2 containing measures M1,M2,M3, 4 dimensions D1,D2,D3,D4, 1 Fact F1 containing measures M1,M2,M3 and surrogate keys K1,K2,K3,K4 (a) write a sql statement to populate Fact table F1 (b) Design a mapping in Informatica for loading of fact table F1.
