Question: Question (2) (Total: 10+5+10 25 points) (a) (10 points) Describe the use of null values in a database. (b) (5 points) Describe the use of

Question (2) (Total: 10+5+10 25 points) (a) (10 points) Describe the use of null values in a database. (b) (5 points) Describe the use of the INTERSECT operator. Can we use INTERSECT if one of the attributes is numeric and another one is character based? (c) (10 points) Suppose you want to build a video site similar to YouTube. Consider the disadvantages of keeping data in a file-processing system. Discuss the relevance of major disadvantages of file system to the storage of actual video data, and to metadata about the video, such as title, the user who uploaded it, tags, and which users viewed it

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3. What might you have done differently

4. Did you rethink your decision?

3. Did you seek anyones advice?