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1CT 394 SAMPLE EXAM QUESTIONS FOR REVISION AND STUDY
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1CT 394 SAMPLE EXAM QUESTIONS FOR REVISION AND STUDY Transformation takes a lot of time and is where the most work is done as transformation has 2 main tasks, transforming the data into useable data ... which is of the same structure and data as of that in the data warehouse and aggregating the data. This phase looks into the primary keys, null values, duplicates, data type, data accuracy and such. For example, which doing our assignment, it took us time to obtain sources but most of the work we did was during the transformation since we used different sources and we didn’t require all the data we obtained as well as not requiring a lot of the information in the sources. We also had to make a lot of calculation which would prove that 80% of our ETL was transformation. [Show More]
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