SQL Practice #218: Penguin Habitat

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Task 218:

For each penguin species, identify its habitat. Print a table with two columns:
- species: the name of the penguin species
- habitat: a sorted list of islands, separated by commas, where each penguin species resides.

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Use SQLite syntax to write your answer. Descriptions of tables are provided at the bottom of the screen.

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Querynomicon Database: table structure and overview

Querynomicon (SQLite) is a compact training database for learning SQL fundamentals with clear and simple examples.

This page presents the tables, key columns, and sample rows for hands-on SQL practice.

The Querynomicon database contains 5 main tables.

List of tables

department - table of departments.

identDepartment ID
nameDepartment name
buildingBuilding name

ident	name	building
gen	Genetics	Chesson

little_penguins - table of little penguins.

speciesPenguin species
islandIsland of residence
bill_length_mmBill length, mm
bill_depth_mmBill depth, mm
flipper_length_mmFlipper length, mm
body_mass_gBody mass, g
sexSex

species	island	bill_length_mm	bill_depth_mm	flipper_length_mm	body_mass_g	sex
Gentoo	Biscoe	52.1	17	230	5550	MALE

penguins - table of penguins.

speciesPenguin species
islandIsland of residence
bill_length_mmBill length, mm
bill_depth_mmBill depth, mm
flipper_length_mmFlipper length, mm
body_mass_gBody mass, g
sexSex

species	island	bill_length_mm	bill_depth_mm	flipper_length_mm	body_mass_g	sex
Gentoo	Biscoe	52.1	17	230	5550	MALE

staff - table of employees.

identEmployee number
personalEmployee first name
familyEmployee last name
deptDepartment
ageAge

ident	personal	family	dept	age
7	Abram	Chokshi	gen	23

machine - table of machines.

identMachine ID
nameMachine name
detailsJSON with details

ident	name	details
1	WY401	{"acquired": "2023-05-01"}
2	Inphormex	{"acquired": "2021-07-15", "refurbished": "2023-10-22"}
3	AutoPlate 9000	{"note": "needs software update"}

Head First SQL: A Learner's Guide to Querying and Managing Data
by Kimberly Fessel

Head First SQL: A Learner's Guide to Querying and Managing Data by Kimberly Fessel

Do you have an abundance of data but don't know how to make sense of it? Do you want to gain useful insights from your data, but you're not sure where to begin? Mining data is a vital, well-paying skill, and SQL provides the most fundamental way to query and manage data. But learning SQL can be intimidating. This thoroughly revised book teaches you SQL fundamentals in a painless and enjoyable manner. With the Head First series’ hands-on, conversational style, you'll quickly grasp SQL concepts, then move to intermediate topics, including subqueries and joins. You'll gain the knowledge, skills, and confidence necessary to get the most out of your data with SQL.