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What is the difference between star and snowflake schemas? Which one would you choose if you have to build a schema? What id the difference between group by and partition by in SQL? Can you describe any query optimization techniques you have used?
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BI Developer

Interviewed at Cognizant

3.4★
Dec 21, 2020

What is the difference between star and snowflake schemas? Which one would you choose if you have to build a schema? What id the difference between group by and partition by in SQL? Can you describe any query optimization techniques you have used?

Please do the following based on the dataset (in the data tab): - Analyze the revenue changes between Mar and Feb - Create the analysis in Power BI or Tableau tool please send the file - Describe your work process using the BI tool
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Senior BI Developer

Interviewed at Bright Data

3.7★
Nov 3, 2023

Please do the following based on the dataset (in the data tab): - Analyze the revenue changes between Mar and Feb - Create the analysis in Power BI or Tableau tool please send the file - Describe your work process using the BI tool

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