The following database has 5 transactions. Let min_sup = 60% and min_conf = 80%.TIDItems_boughtT100{m, o, n, k, e, y}T200{d, o, n, k, e, y}T300{m, a, k, e}T400{m, u, c, k, y}T500{c, o, k, i, e} (2) Select all the strong association rules in the format of {item 1, item 2} -> {item 3}.☐ {k, o} -> {e}☐ {k, e} -> {o}☐ {k, e} -> {y}☐ {e, o} -> {k}☐ {k, y} -> {e}☐ {e, y} -> {k}

A database has five transactions. T100 = {M, O, N, K, E, Y}T200 = {D, O, N, K, E, Y}T300 = {M, A,…

Answered: The following database has 5…

Database System Concepts

7th Edition

ISBN:9780078022159

Author:Abraham Silberschatz Professor, Henry F. Korth, S. Sudarshan

Publisher:Abraham Silberschatz Professor, Henry F. Korth, S. Sudarshan

Chapter1: Introduction

Section: Chapter Questions

Problem 1PE

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q8- Choose ALL that apply.
PLZ help with the following: A nonprofit Canadian organization that provides aid to people after natural disasters needs your help to manage their data and to design a database for them using the following business rules: Individuals volunteer their time to carry out the tasks of the organization. Each volunteer may be assigned to several tasks during the time that they are doing volunteer work, and some tasks require many volunteers. It is possible for a volunteer to be in the system without having been assigned a task yet. It is possible to have tasks that no one has been assigned. When a volunteer is assigned to a task, the system should track the start time and end time of that assignment. The tasks of type “packing” result in the creation of packages. Each individual package of supplies that is produced by the organization is tracked. Each package is assigned an ID number. The date the package was created, and total weight of the package is recorded. A given package is associated…
How many of the relations in Johnny's logical database design have a composite primary key?
The following three tables make up a simple reservation system for a small campground. The database should allow for a camper to make multiple reservations for future dates and for a camping spot to have several reservations for upcoming visits. Table: Camper CAMPER_NUMBER 1000 1001 1002 1003 CAMPER_LAST_NAME Jones Schmidt Williams Cooper CAMPER_FIRST_NAME Jamie Pat Clifford Amanda CAMPER_ADDRESS 1278 Essex Pl 4954 Spangled Way 956 Segull Lane P. O. Box 998877 CAMPER_CITY Birmingham El Paso Portland Portsmouth CAMPER_STATE AL TX ME OH CAMPER_ZIP_CODE 45251 79919 4108 45662 CAMPER_DRIVERS_LICENSE JJ998743-98 87632434 WIL885123 765A876B897 CAMPER_EMAIL jjones@somewhere.com patwonderfu34l@nowhere.net williams98342@foomail.com coopera@nowhere.net Table: Spot SPOT_NUMBER 101 102 103 104 SPOT_NAME The Pines The Glade Teardrop Spot Tent In Trees…
7. A “natural join" in a relational database takes two tables of information and combines entries from the tables that share a particular field. You can read more about this at Wikipedia. Interpret the tables below as sets of sets? For the Course Enrollment Table define A = {{A38182818, Spring2021, Math230, 01}, ..., {A56363631, Spring2021, Math454, 01}}, and for the Student Table define B = {{Al, A81723653}, {Jo, A38182818}, {Su, A56363631}}. Course Enrollment Table Student Table A38182818 | Spring2021 | Math230 | 01 A81723653 | Spring2021 | Math350 01 Al A81723653 A81723653 Fall2020 Math152 04 Jo A56363631 A38182818 Fall2020 Math332 02 Su A38182818 A56363631 | Spring2021 Math454 | 01 (a) Construct the set C = {xUy : x € A, y E B, x N y # 0}. (b) Represent the resulting set C from part (a) as a table, similar to what you see above. Make sure to write down the table for C in a reasonably sorted order. (c) Why would you want to query the database for the set {x € C : Al e x}? Be…
JoziCleaners is local cleaning service that is looking to upgrade their current operations by making use of a database to keep track of the teams, houses, clients and billings of each client per/week. Each house is cleaned by one or more teams. A team goes out to a particular house on a certain day of the week. Each cleaning team has a team leader. Every cleaner eams R150 per day, except the team leader who earns a unique amount. The report that the JoziCleaners' manager produced in Microsoft Excel is illustrated as a spreadsheet in Figure 1 below. Day Client Client Name Team Members Team Leader Leader Total Code ID Wage Monday Aeliana Gebahard T3 6. Jaymes Merrickson R 350 R 850 C10 Alfher Dareia T1 Geoffrey Glover R 250 R 750 C8 Felina Diodotus T2 Elmer Victorson R 300 R 700 Brutus Sigihild Sigibert Quirinus Brutus Sigihild C9 T4 Norris Mamadou R 400 R1 000 Tuesday CS T3 Jaymes Merrickson R 350 R 850 C9 T2 5 Elmer Victorson R 300 R 700 Alfher Dareia Duncan Gardyner Geoffrey Glover…
q20- Choose ALL that apply.
Given the tables create table T (A int primary key, B int); create table U (C int primary key, A int, foreign key(A) references T(A) ); Table T contains 100 rows and table U contains 200 rows. A common mistake made by students is to do a join and assuming the database will supply the join predicate. A student does the query SELECT T.A, T.B, U.C FROM T, U; The student does not get an error message but gets a large result set. How many rows are in the result set?
We have a relational database that contains the table ‘Staff’. The table ‘Staff’ consist of columns ‘Name’, ‘Department’ and ‘Date of Joining’. What query would you use to extract the Names and Department of all staff in the table? a. SELECT * FROM Staff b. a) SELECT Name, Department FROM Staff c. SELECT Name, Department IN Staff d. SELECT * IN Staff
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The following tables describe the content of a relational database:
Database Management Systems

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