Question: Give an example of a pair of groupings that cannot
Give an example of a pair of groupings that cannot be expressed by using a single group by clause with cube and rollup.
Relevant QuestionsGiven a relation S (student, subject, marks), write a query to find the top n students by total marks, by using ranking.Suppose there are two classification rules, one that says that peoplewith salaries between $10,000 and $20,000 have a credit rating of good, and another that says that people with salaries between $20,000 and $30,000 have a ...Suppose you want to find documents that contain at least k of a given set of n keywords. Suppose also you have a keyword index that gives you a (sorted) list of identifiers of documents that contain a specified keyword. Give ...What problems can occur in a continuous-media system if data is delivered either too slowly or too fast?If the entire database fits in main memory, do we still need a database system to manage the data? Explain your answer.
Post your question