Computers and Technology, 19.11.2019 06:31 dsaefong00
2. consider the following normalized relations for a sports league and assume that the database is global in scope and covers thousands of leagues, tens of thousands of teams, and hundreds of thousands of players. team(teamid, teamname, teamlocation, teammanager, teamleague)player(playerid, playerfirstname, playerlastname, playerdateofbirth, playerspecialtycode, teamid)specialty(specialtycode, specialtydescription, salary)location(locationid, cityname, citystate, citycountry, citypopulation) manager(managerid, managername)league(leagueid, leaguename, leaguelocation)a. do you see any denormalization opportunities? b. what are the first steps that you can take to improve the performance of the database? c. specify the types of indexes you would recommend for each of the following situations: 1. reporting players by team using the team name 2. reporting players of a specific specialty using the specialty code. how is your answer different if the report is using specialty description as input? 3. reporting the players whose salary is above a specific value. 4. reporting teams and their players by cityd. do you see any partitioning opportunities based on the above queries?
Answers: 2
Computers and Technology, 22.06.2019 22:00
Researchers measured the data speeds for a particular smartphone carrier at 50 airports. the highest speed measured was 78.1 mbps. the complete list of 50 data speeds has a mean of x overbarequals16.11 mbps and a standard deviation of sequals18.65 mbps. a. what is the difference between carrier's highest data speed and the mean of all 50 data speeds? b. how many standard deviations is that [the difference found in part (a)]? c. convert the carrier's highest data speed to a z score. d. if we consider data speeds that convert to z scores between minus2 and 2 to be neither significantly low nor significantly high, is the carrier's highest data speed significant? a. the difference is nothing mbps.
Answers: 3
Computers and Technology, 23.06.2019 04:20
Which network media uses different regions of the electromagnetic spectrum to transmit signals through air? uses different regions of the electromagnetic spectrum to transmit signals through air.
Answers: 2
Computers and Technology, 23.06.2019 12:20
When guido van rossum created python, he wanted to make a language that was more than other programming languages. a. code-based b. human-readable c. complex d. functional
Answers: 1
Computers and Technology, 23.06.2019 14:30
Which of the following would not be considered a pc? a. mainframe b. desktop c. tablet pc d. laptop
Answers: 2
2. consider the following normalized relations for a sports league and assume that the database is g...
English, 25.12.2021 14:50
Health, 25.12.2021 14:50
Mathematics, 25.12.2021 14:50
Mathematics, 25.12.2021 14:50
Physics, 25.12.2021 14:50
Mathematics, 25.12.2021 14:50
Social Studies, 25.12.2021 14:50
English, 25.12.2021 14:50
Arts, 25.12.2021 14:50
Arts, 25.12.2021 14:50
Geography, 25.12.2021 14:50
Mathematics, 25.12.2021 15:00