All entity names, relationship names, and attribute definitions must be correct.

11. Foreign key is the one in which the ________ of one relation is referenced in another relation. a. Foreign key b. Primary key c. References d. Check constraint

Design your application's/organization's database. You need to create the 3 tables for each of the services offered. You must provide at least 5 examples in each of the table. There must be a table in which you have prices linked to the services you are providing. THIS IS THE NAME & DESCRIPTION OF THE ORGANIZATION FOR WHICH YOU NEED TO CREATE 3 TABLES FOR EACH SERVICE PROVIDED *Name of the Organization* :: ECOHUB *Description of the Organization* :: EcoHub is a sustainability-focused organisation that seeks to encourage environmentally friendly behaviours, increase public knowledge of environmental problems, and offer solutions for people, organisations, and communities to reduce their carbon footprint and help make the world a greener place. We think that many little individual actions can have a big influence on the environment when taken together. *Services Offered by the Organization are*1. EcoConsultancy : We provide individualised eco-consultancy services to people and…

The database should contain the following six tables: Artists (artist_id: char(30), artist_name: char(30), artist_pop: int(5))Tracks (track_id: char(30), track_name: char(30), duration: int(10), tempo:real) Record (artist_id: char(30), track_id: char(30))Users (user_id: char(30), user_name: char(30), age: int(5), nationality: char(30), num_track_listened: int(10))Listen (user_id: char(30), track_id: char(30))Follow (user_id: char(30), artist_id: char(30), follow_date: datetime) Write a single SQL query for each request below. Find the ids of those users who have listened to at least one track but have not followed any artists. Find the ids and names of those users who have listened to some tracks recorded by the artist named 'Adele'. Find the ids and names of those users who have not listened to any track recorded by the artist named 'Adele'. Use ''NOT EXISTS'' to answer this query.