Explain what are the vaious etl tools in the market?


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for data loading in oracle, what are conventional loading , what are conventional loading and direct-path loading?

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What is the difference between metadata and data dictionary?

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What is difference between query studio and report studio?

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What is IQD file?

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Do you always need to copy the data before reporting on it?(Example, real-time & on-demand reporting is a requirement)?

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What is your spectra photometer working principles?

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What is a cube in data warehousing concept?

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What is ods (operation data source)?

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What is cubes?

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Why null values are mapped as 0 in fact tables?

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Explain is olap databases are called decision support system true/false?

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How are models actually derived?

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