Question

Consider the following database schema: LIKE(person, sport), PRACTICE(person, sport), where person and sport are keys in...

Consider the following database schema: LIKE(person, sport), PRACTICE(person, sport), where person and sport are keys in both tables. The table LIKE gives the sports a person likes, the table PRACTICE gives the sports a person practices. We assume that a person likes at least one sport and practices at least one sport. We assume also that a person does not like a sport if the sport is not listed among the sports that person likes

Express the following queries in Calculus 1. List the sports that John likes 2. Among the sports that John practices, which ones does he like? 3. Which sports John does not like 4. List the people who practice at least one sport John likes 5. List the people who practice at list one sport they like

Homework Answers

Know the answer?
Your Answer:

Post as a guest

Your Name:

What's your source?

Earn Coins

Coins can be redeemed for fabulous gifts.

Not the answer you're looking for?
Ask your own homework help question
Similar Questions
Consider the following database schema: LIKE(person, sport), PRACTICE(person, sport), where person and sport are keys in...
Consider the following database schema: LIKE(person, sport), PRACTICE(person, sport), where person and sport are keys in both tables. The table LIKE gives the sports a person likes, the table PRACTICE gives the sports a person practices. We assume that a person likes at least one sport and practices at least one sport. We assume also that a person does not like a sport if the sport is not listed among the sports that person likes Express the following queries in...
Consider the following database schema: LIKE(person, sport), PRACTICE(person, sport), where person and sport are keys in...
Consider the following database schema: LIKE(person, sport), PRACTICE(person, sport), where person and sport are keys in both tables. The table LIKE gives the sports a person likes, the table PRACTICE gives the sports a person practices. We assume that a person likes at least one sport and practices at least one sport. We assume also that a person does not like a sport if the sport is not listed among the sports that person likes Express the following queries in...
LIKE(person, sport), PRACTICE(person, sport), where person and sport are keys in both tables. The table LIKE...
LIKE(person, sport), PRACTICE(person, sport), where person and sport are keys in both tables. The table LIKE gives the sports a person likes, the table PRACTICE gives the sports a person practices. We assume that a person likes at least one sport and practices at least one sport. We assume also that a person does not like a sport if the sport is not listed among the sports that person likes Express the following queries in Calculus List pairs of people...
Practice writing SQL queries ----------------------------- For this question, we will consider the following tables about people,...
Practice writing SQL queries ----------------------------- For this question, we will consider the following tables about people, grades, and courses. Your task is to express each of the given queries in SQL. Example data are provided in these tables for your convenience but note that they are only example data. Your queries must work for all potential data residing in the given tables, not just those illustrated here. People (id, name, age, address) --------------------------------------------------- p1 | Tom Martin| 24 | 11,...
The relational schema for the Academics database is as follows: DEPARTMENT(deptnum, descrip, instname, deptname, state, postcode)...
The relational schema for the Academics database is as follows: DEPARTMENT(deptnum, descrip, instname, deptname, state, postcode) ACADEMIC(acnum, deptnum*, famname, givename, initials, title) PAPER(panum, title) AUTHOR(panum*, acnum*) FIELD(fieldnum, id, title) INTEREST(fieldnum*, acnum*, descrip) Some notes on the Academics database: An academic department belongs to one institution (instname) and often has many academics. An academic only works for one department. Research papers (PAPER) are often authored by several academics, and of course an academic often writes several papers (AUTHOR). A research field...
The following is about databases: queries on relational algebra Consider the following schemas for a LinkedIn-like...
The following is about databases: queries on relational algebra Consider the following schemas for a LinkedIn-like professional network. Note this is a slightly simplified version from your last assignment. Assume that the connections are mutual. Person (PID, first_name, last_name, age, gender) School (school_ID, school_name, type, city, state) Education (PID, school_ID, degree, major, year) Company (company_ID, company_name, total_asset, headquarter) Branch (company_ID, branch_num, city, state) WorksAt (PID, company_ID, branch_num, start, end) Connection (PID, friend_ID) For each relation, the attribute(s) of the primary...
The following is about databases: queries on relational algebra Consider the following schemas for a LinkedIn-like...
The following is about databases: queries on relational algebra Consider the following schemas for a LinkedIn-like professional network. Note this is a slightly simplified version from your last assignment. Assume that the connections are mutual. Person (PID, first_name, last_name, age, gender) School (school_ID, school_name, type, city, state) Education (PID, school_ID, degree, major, year) Company (company_ID, company_name, total_asset, headquarter) Branch (company_ID, branch_num, city, state) WorksAt (PID, company_ID, branch_num, start, end) Connection (PID, friend_ID) For each relation, the attribute(s) of the primary...
Summary The Ch08_ConstructCo database stores data for a consulting company that tracks all charges to projects....
Summary The Ch08_ConstructCo database stores data for a consulting company that tracks all charges to projects. The charges are based on the hours each employee works on each project. The structure and contents of the Ch08_ConstructCo database are shown in Figure P8.1. Use this database to answer the following problems. Database Schema The schema for the Ch08_ConstructCo database is shown below and should be used to answer the next several problems. Click this image to view it in its own...
QUESTION 1 Advanced Security Inc. was hired by the Treasury Bank Inc. for securing their systems....
QUESTION 1 Advanced Security Inc. was hired by the Treasury Bank Inc. for securing their systems. The first thing they did was implement the best practice if separation of domains. As a result of this The bank had to get a new domain name. any change made in the records points to only one party who could have made that change. If you are a technical person, you must have office in a particular area of the building. accessing outside...
A bank has developed a set of criteria for evaluating distressed credit of company. Companies that...
A bank has developed a set of criteria for evaluating distressed credit of company. Companies that passed the test will go bankrupt (non-survivor) with probability 0.4. There are 55% of the companies passed the test. The probability that a company did not pass the test will subsequently survive is 0.10 a. What is the probability that a random company will survive (not going to bankrupt)?      b. A random survived company is selected, what is the probability that company passed...