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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
SELECT valuation FROM funding
Spinner
DataFrameas
df
variable
WITH unicorns AS (
SELECT
	i.industry
	,DATE_PART('Year', d.date_joined) AS year
	,COUNT(*)AS num_unicorns
	,ROUND(AVG(f.valuation),2) AS average_valuation_billions
FROM industries AS i
JOIN dates AS d
	ON d.company_id = i.company_id
JOIN funding AS f
	ON f.company_id = i.company_id
GROUP BY DATE_PART('Year', d.date_joined), i.industry
HAVING DATE_PART('Year', d.date_joined) IN (2019,2020,2021)
)
SELECT 	
	industry
	,year
	,num_unicorns
	,RANK() OVER(PARTITION BY industry ORDER BY average_valuation_billions) AS 	average_valuation_billions
	FROM unicorns;
	
Spinner
DataFrameas
df
variable
WITH top_industries AS (
    SELECT i.industry, 
        COUNT(i.*)
    FROM industries AS i
    INNER JOIN dates AS d
        ON i.company_id = d.company_id
    WHERE EXTRACT(year FROM d.date_joined) in ('2019', '2020', '2021')
    GROUP BY industry
    ORDER BY count DESC
    LIMIT 3),
yearly_rankings AS (
SELECT
	i.industry
    ,COUNT(d.*) AS num_unicorns
	,DATE_PART('Year', d.date_joined) AS year
	,AVG(f.valuation) AS average_valuation
FROM industries AS i
JOIN dates AS d
        ON i.company_id = d.company_id
JOIN funding AS f
	ON d.company_id = f.company_id
WHERE EXTRACT(year FROM d.date_joined) in ('2019', '2020', '2021')
GROUP BY i.industry,DATE_PART('Year', d.date_joined)
)

SELECT industry,
    year,
    num_unicorns,
    ROUND(AVG(average_valuation / 1000000000), 2) AS average_valuation_billions
FROM yearly_rankings
WHERE  industry in (SELECT industry
                    FROM top_industries)
GROUP BY industry, num_unicorns, year, average_valuation
ORDER BY industry, year DESC

	

Spinner
DataFrameas
df
variable
SELECT
	i.industry
    ,COUNT(d.*)
	,DATE_PART('Year', d.date_joined) AS year
	,AVG(f.valuation) AS average_valuation_billions
FROM industries AS i
JOIN dates AS d
        ON i.company_id = d.company_id
JOIN funding AS f
	ON d.company_id = f.company_id
WHERE EXTRACT(year FROM d.date_joined) in ('2019', '2020', '2021')
GROUP BY i.industry,DATE_PART('Year', d.date_joined);