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>
57 lines
1.6 KiB
SQL
57 lines
1.6 KiB
SQL
-- Intermediate: Housing indicators by neighbourhood
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-- Combines census housing data with allocated CMHC rental data
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-- Grain: One row per neighbourhood per year
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with neighbourhoods as (
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select * from {{ ref('stg_toronto__neighbourhoods') }}
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),
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census as (
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select * from {{ ref('stg_toronto__census') }}
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),
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allocated_rentals as (
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select * from {{ ref('int_rentals__neighbourhood_allocated') }}
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),
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housing as (
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select
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n.neighbourhood_id,
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n.neighbourhood_name,
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n.geometry,
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coalesce(r.year, c.census_year) as year,
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-- Census housing metrics
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c.pct_owner_occupied,
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c.pct_renter_occupied,
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c.average_dwelling_value,
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c.median_household_income,
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-- Allocated rental metrics (weighted average from CMHC zones)
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r.avg_rent_2bed,
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r.vacancy_rate,
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-- Affordability calculations
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case
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when c.median_household_income > 0 and r.avg_rent_2bed > 0
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then round((r.avg_rent_2bed * 12 / c.median_household_income) * 100, 2)
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else null
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end as rent_to_income_pct,
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-- Affordability threshold (30% of income)
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case
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when c.median_household_income > 0 and r.avg_rent_2bed > 0
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then r.avg_rent_2bed * 12 <= c.median_household_income * 0.30
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else null
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end as is_affordable
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from neighbourhoods n
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left join census c on n.neighbourhood_id = c.neighbourhood_id
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left join allocated_rentals r
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on n.neighbourhood_id = r.neighbourhood_id
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and r.year = c.census_year
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)
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select * from housing
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