Write the appropriate SQL queries a) List the sailor who made the highest number of reservations for each boat. b) List, for every boat, the number of times it has been reserved, including those boats that have never been reserved (list the id and the name). c) List those sailors who have reserved only red boats.

Write the appropriate SQL queries a) List the sailor who made the highest number of reservations for each boat. b) List, for every boat, the number of times it has been reserved, including those boats that have never been reserved (list the id and the name). c) List those sailors who have reserved only red boats.

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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Concept explainers

Multiple Table

In a database, a table is used to store data in the form of rows and columns. Rows are aligned horizontally and identified by one or more values in a specific column. Columns are vertically aligned and identified by a unique column name.

Question

Given the Sailor, Boat, and Reservation tables.
Sailor Table
Reservation Table
ID (PK)
NAME
RATING
AGE
SID (FK)
BID (FK)
DAY
22
Dustin
7
45
22
101
10.10.2006
31
Lubber
8
65,5
58
Rusty
10
35
58
103
11.12.2011
59
Smith
9
41
31
104
4.02.2007
31
103
5.02.2007
Boat Table
58
103
6.02.2007
ID (PK)
NAME
COLOUR
101
Interlake
blue
31
102
15.02.2007
102
Interlake
red
59
102
5.01.2008
103
Clipper
green
red
104
Marine
31
101
5.01.2008
Write the appropriate SQL queries
a) List the sailor who made the highest number of reservations for each boat.
b) List, for every boat, the number of times it has been reserved, including those boats
that have never been reserved (list the id and the name).
c) List those sailors who have reserved only red boats.
d) For which boat are there the most reservations?
e) Select all sailors who have never reserved a red boat.
f) Find the sailors who have made, for each boat colour, at least one reservation for a
boat with that colour.

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