school_compare/pipeline/transform/models/marts/dim_school.sql

-- Mart: Canonical school dimension — one row per active URN

with schools as (
    select * from {{ ref('stg_gias_establishments') }}
)

{% set ofsted_relation = adapter.get_relation(
    database=target.database,
    schema=target.schema,
    identifier='int_ofsted_latest'
) %}

select
    s.urn,
    s.local_authority_code * 1000 + s.establishment_number as laestab,
    s.school_name,
    s.phase,
    s.school_type,
    s.academy_trust_name,
    s.academy_trust_uid,
    s.religious_character,
    s.gender,
    s.statutory_low_age || '-' || s.statutory_high_age as age_range,
    s.capacity,
    s.total_pupils,
    concat_ws(' ', s.head_title, s.head_first_name, s.head_last_name) as headteacher_name,
    s.website,
    s.telephone,
    s.open_date,
    s.close_date,
    s.status,
    s.nursery_provision,
    s.admissions_policy,

    -- Latest Ofsted (populated after monthly Ofsted pipeline runs)
    {% if ofsted_relation is not none %}
    o.overall_effectiveness as ofsted_grade,
    o.inspection_date as ofsted_date,
    o.framework as ofsted_framework
    {% else %}
    null::text as ofsted_grade,
    null::date as ofsted_date,
    null::text as ofsted_framework
    {% endif %}

from schools s
{% if ofsted_relation is not none %}
left join {{ ref('int_ofsted_latest') }} o on s.urn = o.urn
{% endif %}
where s.status = 'Open'