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Did you know that the average return from investing in stocks is 10% per year! But who wants to be average?!

You have been asked to support an investment firm by analyzing trends in high-growth companies. They are interested in understanding which industries are producing the highest valuations and the rate at which new high-value companies are emerging. Providing them with this information gives them a competitive insight as to industry trends and how they should structure their portfolio looking forward.

You have been given access to their unicorns database, which contains the following tables:

dates

ColumnDescription
company_idA unique ID for the company.
date_joinedThe date that the company became a unicorn.
year_foundedThe year that the company was founded.

funding

ColumnDescription
company_idA unique ID for the company.
valuationCompany value in US dollars.
fundingThe amount of funding raised in US dollars.
select_investorsA list of key investors in the company.

industries

ColumnDescription
company_idA unique ID for the company.
industryThe industry that the company operates in.

companies

ColumnDescription
company_idA unique ID for the company.
companyThe name of the company.
cityThe city where the company is headquartered.
countryThe country where the company is headquartered.
continentThe continent where the company is headquartered.
Spinner
DataFrameas
df
variable
WITH top_industries AS (
SELECT industry,
    count(*)
FROM industries
INNER JOIN dates
USING(company_id)
WHERE EXTRACT(year FROM date_joined) BETWEEN 2019 AND 2021
GROUP BY industry
ORDER BY count(*) DESC
LIMIT 3),

rankings AS (
SELECT industry,
    EXTRACT(year FROM date_joined) as year,
    count(*) AS num_unicorns,
	ROUND(avg(valuation)/1000000000, 2) AS average_valuation_billions
FROM industries
INNER JOIN funding
USING(company_id)
INNER JOIN dates
USING(company_id)
GROUP BY industry, year)

SELECT industry, year, num_unicorns, average_valuation_billions
FROM rankings
WHERE year BETWEEN 2019 AND 2021
	AND industry in 
		(SELECT industry
         FROM top_industries)
ORDER BY industry, year DESC