Wk1 Project INFO620: Challenge Database Systems
Exhaust the supplied PDF e book “Fundamentals of Database Systems 7E” to retort all of the questions listed under.
CH1: DATABASES AND DATABASE USERS
#1.9 – What’s the difference between managed and uncontrolled redundancy?
#1.10 – Specify all of the relationships amongst the guidelines of the database shown in Figure 1.2.
#1.12 – Cite some examples of integrity constraints that you imagine can notice to the database shown in Figure 1.2.
#1.13 – Give examples of programs whereby it might perchance perhaps perchance manufacture sense to make consume of worn file processing in preference to a database approach.
#1.14 – Judge Figure 1.2.
a. If the name of the ‘CS’ (Laptop Science) Division changes to ‘CSSE’ (Laptop Science and Tool Engineering) Division and the corresponding prefix for the course quantity also changes, name the columns in the database that might perchance well perchance need to be updated.
b. Can you restructure the columns in COURSE, SECTION, and PREREQUISITE tables so as that only one column will need to be updated?
CH 2: DATABASE SYSTEM CONCEPTS AND ARCHITECTURE
#2.14 – while you happen to were designing a Web-basically based system to fabricate airline reservations and to sell airline tickets, which DBMS Architecture would you settle between Portion 2.5? Why? Why would the other architectures no longer be a simply decision?
#2.15 – Judge Figure 2.1. As successfully as to constraints relating the values of columns in a single table to columns in a single more table, there are also constraints that impose restrictions on values in a column or a aggregate of columns within a table. One such constraint forces that a column or a neighborhood of columns might perchance well perchance serene be exciting right thru all rows in the table. Shall we embrace, in the STUDENT table, the StudentNumber column might perchance well perchance serene be exciting (to stop two utterly different students from having the identical StudentNumber). Establish the column or the neighborhood of columns in the other tables that can serene be exciting right thru all rows in the table?
CH 3: THE RELATIONAL DATA MODEL AND RELATIONAL DATABASE CONSTRAINTS
3.17 – Composite and multi-valued attributes will also be nested to any different of ranges.
Allege we deserve to fabricate an attribute for a STUDENT entity form to construct music of old college training. Such an attribute can grasp one entry for every and every college beforehand attended, and this entry includes: college name, originate and conclude dates, degree entries (levels awarded at that college, if any), and transcript entries (classes done at that college, if any). Each and every degree entry is fashioned of degree name and the month and yr it became once awarded, and each and every transcript entry is fashioned of a course name, semester, yr, and grade. Designate an attribute to motivate this data. Exhaust the conventions of Figure 7.5.
3.22 – A database is being constructed to construct music of the groups and games of a sports activities league. A team has a different of gamers, no longer all of whom take half in each and every recreation.
It’s far desired to construct music of the gamers participating in each and every recreation for every and every team, the positions they played in that recreation, and the conclude outcomes of the recreation. Are trying and fabricate an ER schema draw for this software, stating any assumptions you manufacture. Settle your favourite sport (soccer, football, baseball …).
CHAPTER 4: THE ENHANCED ENTITY-RELATIONSHIP (EER) MODEL
4.17 – Judge the BANK ER schema of Figure 3.21, and affirm that it is far well-known to construct music of utterly different kinds of ACCOUNTS (SAVINGS_ACCTS, CHECKING_ACCTS,…) and LOANS (CAR_LOANS, HOME_LOANS, …). Allege that it might perchance be neat to construct music of each and every yarn’s TRANSACTIONs (deposits, withdrawals, tests, …) and each and every mortgage’s PAYMENTs; both of these embrace the amount, date, time, … Alter the BANK schema, the usage of ER and EER ideas of specialization and generalization. Voice any assumptions you manufacture in regards to the extra necessities.
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