SELECT sector.sector, count(*)
FROM reports, organization, sector
WHERE reports.org_id = organization.id
AND organization.id = sector.org_id
GROUP BY sector.sector;
正直なところ、sqlalchemy でこの GROUP BY と JOIN の表現をどこから始めればよいかさえわかりません。
SELECT sector.sector, count(*)
FROM reports, organization, sector
WHERE reports.org_id = organization.id
AND organization.id = sector.org_id
GROUP BY sector.sector;
正直なところ、sqlalchemy でこの GROUP BY と JOIN の表現をどこから始めればよいかさえわかりません。