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1. Find the colors of boats reserved by lubber. 2. Find all sailor id's of sailors who have a rating of at least 5 and reserved boat 101. 3. Find the names of sailors who reserved a blue boat, have rating at least 8 and older than 40.

1. Find the colors of boats reserved by lubber. 2. Find all sailor id's of sailors who have a rating of at least 5 and reserved boat 101. 3. Find the names of sailors who reserved a blue boat, have rating at least 8 and older than 40.

Computer Networking: A Top-Down Approach (7th Edition)
Computer Networking: A Top-Down Approach (7th Edition)
7th Edition
ISBN:9780133594140
Author:James Kurose, Keith Ross
Publisher:James Kurose, Keith Ross
Chapter1: Computer Networks And The Internet
Section: Chapter Questions
Problem R1RQ: What is the difference between a host and an end system? List several different types of end...
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Database Systems please help me answer this question I will give you a good rating Thank you!

### Relational Database Operations Assignment This educational exercise is designed to test your understanding of basic database operations using relational algebra. Below, you will find a problem set featuring a relational schema of a sailing club, along with three specific queries to solve. #### Database Schema: - **Sailors Table (Sailors)** - `sid` (Sailor ID) - `sname` (Sailor Name) - `rating` (Rating) - `age` (Age) - **Boats Table (Boats)** - `bid` (Boat ID) - `name` (Boat Name) - `color` (Boat Color) - **Reserves Table (Reserves)** - `sid` (Sailor ID) - `bid` (Boat ID) - `day` (Reservation Day) #### Operations: - Selection (σ) - Projection (π) - Set Operations (∩, ∪, -) - Join Operation (⨝) #### Problem Set: 1. **Find the colors of boats reserved by Lubber.** 2. **Find all sailor IDs (sid) of sailors who have a rating of at least 5 and have reserved boat 101.** 3. **Find the names of sailors who reserved a blue boat, have a rating of at least 8, and are older than 40.** #### How to Approach: - Utilize the relational algebra symbols provided. - Combine the statements using the appropriate operations to retrieve the required data. By completing these tasks, you will gain practical experience in querying and manipulating relational databases, an essential skill in database management and information technology fields.
Transcribed Image Text:### Relational Database Operations Assignment This educational exercise is designed to test your understanding of basic database operations using relational algebra. Below, you will find a problem set featuring a relational schema of a sailing club, along with three specific queries to solve. #### Database Schema: - **Sailors Table (Sailors)** - `sid` (Sailor ID) - `sname` (Sailor Name) - `rating` (Rating) - `age` (Age) - **Boats Table (Boats)** - `bid` (Boat ID) - `name` (Boat Name) - `color` (Boat Color) - **Reserves Table (Reserves)** - `sid` (Sailor ID) - `bid` (Boat ID) - `day` (Reservation Day) #### Operations: - Selection (σ) - Projection (π) - Set Operations (∩, ∪, -) - Join Operation (⨝) #### Problem Set: 1. **Find the colors of boats reserved by Lubber.** 2. **Find all sailor IDs (sid) of sailors who have a rating of at least 5 and have reserved boat 101.** 3. **Find the names of sailors who reserved a blue boat, have a rating of at least 8, and are older than 40.** #### How to Approach: - Utilize the relational algebra symbols provided. - Combine the statements using the appropriate operations to retrieve the required data. By completing these tasks, you will gain practical experience in querying and manipulating relational databases, an essential skill in database management and information technology fields.
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