What are the three primary data gathering methods? What method would you use if you were gathering d 1 answer below »

What are the three primary data gathering methods? What method would you use if you were gathering data on a movie studio? A grocery retailer? A pharmaceutical company? Why did you select that method for each of the types of companies identified over the other methods?

250-300 words

What are the differences between databases, data warehouses, and data mining? When would you use one over another?