Reference no: EM131248859
Q.1 What are the drawbacks of using file system over database management system?
Q.2 Explain the distinctions among the terms primary key, candidate key, and super key.
Q.3 Consider the bank database.
branch(branch name, branch city, assets)
customer (customer name, customer street, customer city)
loan (loan number, branch name, amount)
borrower (customer name, loan number)
account (account number, branch name, balance)
depositor (customer name, account number)
Give an expression in the relational algebra for each of the following queries:
a. Find all loan numbers with a loan value greater than $50,000.
b. Find the names of all depositors who have an account with a value greater than $9,000.
c. Find the names of all depositors who have an account with a value greater than $8,000 at the "Uptown" branch.
Q4: Consider the advisor relation shown in Figure 2, with s_id as the primary key of advisor.
Suppose a student can have more than one advisor. Then, would s_id still be a primary key of the advisor relation? If not, what should the primary key of advisor be?
Schema Diagram for University Database.
Develop annotated bibliography to indicate quality of source
: Develop an annotated bibliography to indicate the quality of the sources you have read. For each annotation, you need to summarize in your own words how the source contributes to the solution of the global societal issue.
|
How many of the apps listed on the website do you have
: Do some brief Internet research to see the information that "Pokemon Go" captures when using the software. What are your thoughts about providing access to this information being gathered by the developers? After reading all this, are you more or les..
|
How many as have mod 10 inverses
: How many a's have mod 10 inverses? (Uniqueness) - Show that if a and m are relatively prime, then the inverse of a mod m is unique.
|
Comprehensive marketing plan researching
: Marketing Plan This week you will continue your comprehensive marketing plan researching the SAME company that you researched in previous units. Again, utilizing the CSU Online Library, you will research the various elements of the marketing plan ..
|
Distinctions among terms primary - candidate and super key
: Find all loan numbers with a loan value greater than $50,000. Find the names of all depositors who have an account with a value greater than $9,000. Find the names of all depositors who have an account with a value greater than $8,000 at the "Uptown"..
|
General method for determining c and d in such a cipher
: Show that the message can be recovered by an affine transformation of the form and determine the constants c and d.
|
How darwin theories altered the socio cultural landscape
: After reading Charles Darwin's "Natural Selection" from The Origin of Species, write a paper that speculates how Darwin's theories altered the socio cultural landscape of the late 19th Century
|
Liquidated damages clause
: How would the court determine whether the liquidated damages clause is valid? Is this clause valid? Explain your answers. Cite any direct quotes or paraphrased material from outside sources. Use APA format. Information about accessing the grading ru..
|
What is the general procedure for finding the number
: Encoding single letters one by one is rather limiting, since there are only 26 possible messages. - What is the general procedure for finding the number corresponding to a digraph?
|