lmiranda
b6d210ec6b
Create neighbourhood-centric dbt transformation layer: Staging (5 models): - stg_toronto__neighbourhoods - Neighbourhood dimension - stg_toronto__census - Census demographics - stg_toronto__crime - Crime statistics - stg_toronto__amenities - Amenity counts - stg_cmhc__zone_crosswalk - Zone-to-neighbourhood weights Intermediate (5 models): - int_neighbourhood__demographics - Combined census with quintiles - int_neighbourhood__housing - Housing + affordability indicators - int_neighbourhood__crime_summary - Aggregated crime with YoY - int_neighbourhood__amenity_scores - Per-capita amenity metrics - int_rentals__neighbourhood_allocated - CMHC via area weights Marts (5 models): - mart_neighbourhood_overview - Composite livability score - mart_neighbourhood_housing - Affordability index - mart_neighbourhood_safety - Crime rates per 100K - mart_neighbourhood_demographics - Income/age indices - mart_neighbourhood_amenities - Amenity index Closes #60, #61, #62, #63 Co-Authored-By: Claude Opus 4.5 <noreply@anthropic.com>
45 lines
1.1 KiB
SQL
45 lines
1.1 KiB
SQL
-- Intermediate: Combined census demographics by neighbourhood
|
|
-- Joins neighbourhoods with census data for demographic analysis
|
|
-- Grain: One row per neighbourhood per census year
|
|
|
|
with neighbourhoods as (
|
|
select * from {{ ref('stg_toronto__neighbourhoods') }}
|
|
),
|
|
|
|
census as (
|
|
select * from {{ ref('stg_toronto__census') }}
|
|
),
|
|
|
|
demographics as (
|
|
select
|
|
n.neighbourhood_id,
|
|
n.neighbourhood_name,
|
|
n.geometry,
|
|
n.land_area_sqkm,
|
|
|
|
c.census_year,
|
|
c.population,
|
|
c.population_density,
|
|
c.median_household_income,
|
|
c.average_household_income,
|
|
c.median_age,
|
|
c.unemployment_rate,
|
|
c.pct_bachelors_or_higher as education_bachelors_pct,
|
|
c.average_dwelling_value,
|
|
|
|
-- Tenure mix
|
|
c.pct_owner_occupied,
|
|
c.pct_renter_occupied,
|
|
|
|
-- Income quintile (city-wide comparison)
|
|
ntile(5) over (
|
|
partition by c.census_year
|
|
order by c.median_household_income
|
|
) as income_quintile
|
|
|
|
from neighbourhoods n
|
|
left join census c on n.neighbourhood_id = c.neighbourhood_id
|
|
)
|
|
|
|
select * from demographics
|