Given a relation: Student (SID, SName, major, age, city). Th…
Given a relation: Student (SID, SName, major, age, city). The data file contains 1000 pages and each page contains 100 tuples. Suppose there is a B+tree index on city and it is unclustered. There are 100 different cities stored in the table and uniform distribution is assumed for the values. The index file contains 20 pages. Given the query: Select * from Student where city=”Rochester”, which of the query plan is more efficient?
Read DetailsWhich of the following schedules is serializable? Note that,…
Which of the following schedules is serializable? Note that, R, W, C refer to read, write, commit operations respectively; 1, 2 are the indexes of transactions; X, Y, Z are data items. For example, R1(X) means Transaction 1 reads X.
Read DetailsHow to complete the assignments Students will complete the d…
How to complete the assignments Students will complete the downloadable worksheet first to answer each question. Then, you will input your answers into the “Quiz” on Blackboard based on what you found in the worksheet. Academic Integrity Students are expected to complete their own work. No use of AI generated answers is permitted; inclusion of AI generated work or plagiarized work in any capacity will result in a zero score and university policies regarding academic dishonesty will be followed.
Read DetailsDid you know that Grand Forks has a Youth Commission? From t…
Did you know that Grand Forks has a Youth Commission? From their website, “the Grand Forks Youth Commission is a cooperative coalition of youth and adult mentors working to enhance the lives of Grand Forks Youth. It is a joint partnership between the Grand Public Schools district and the city of Grand Forks. The Youth Commission exists to identify, promote, improve, increase and provide services and programs for young people in Grand Forks.” Given their aims and purposes, which level of the socio-ecological model would this youth commission likely exist?
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