DataCamp

Build a Query to Determine the Percentage of Population by Gender and State

In this exercise, you will write a query to determine the percentage of the population in 2000 that comprised of women. You will group this query by state.

Import case, cast and Float from sqlalchemy.
Define a statement to select state and the percentage of females in 2000.
- Inside func.sum(), use case() to select females (using the sex column) from pop2000. Remember to specify else_=0 if the sex is not 'F'.
- To get the percentage, divide the number of females in the year 2000 by the overall population in 2000. Cast the divisor - census.columns.pop2000 - to Float before multiplying by 100.
Group the query by state.
Execute the query and store it as results.
Print state and percent_female for each record. This has been done for you, so hit 'Submit Answer' to see the result.

Take Hint (-30 XP)

Exercise

Build a Query to Determine the Percentage of Population by Gender and State

Instructions