FHIR IG analytics

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Narrative

Note: links and images are rebased to the (stated) source

WITH ranked_addresses AS (
  SELECT
    patient_view.id AS patient_id,
    patient_view.name,
    patient_address_view.address_line1,
    patient_address_view.city,
    patient_address_view.state,
    patient_address_view.postal_code,
    patient_address_view.updated_at,
    ROW_NUMBER() OVER (
      PARTITION BY patient_view.id
      ORDER BY patient_address_view.updated_at DESC, patient_address_view.address_id DESC
    ) AS address_rank
  FROM patient_view
  JOIN patient_address_view
    ON patient_view.id = patient_address_view.patient_id
  WHERE patient_view.active = true
    AND patient_address_view.city = :city
)
SELECT
  patient_id,
  name,
  address_line1,
  city,
  state,
  postal_code
FROM ranked_addresses
WHERE address_rank = 1

SELECT DISTINCT ON (patient_view.id)
  patient_view.id AS patient_id,
  patient_view.name,
  patient_address_view.address_line1,
  patient_address_view.city,
  patient_address_view.state,
  patient_address_view.postal_code
FROM patient_view
JOIN patient_address_view
  ON patient_view.id = patient_address_view.patient_id
WHERE patient_view.active = true
  AND patient_address_view.city = :city
ORDER BY patient_view.id, patient_address_view.updated_at DESC, patient_address_view.address_id DESC

Source1

{
  "resourceType": "Library",
  "id": "UniquePatientAddressesQuery",
  "meta": {
    "profile": [
      "https://sql-on-fhir.org/ig/StructureDefinition/SQLQuery"
    ]
  },
  "text": {
    "status": "generated",
    "div": "<!-- snip (see above) -->"
  },
  "url": "https://sql-on-fhir.org/ig/Library/UniquePatientAddressesQuery",
  "version": "2.1.0-pre",
  "name": "UniquePatientAddressesQuery",
  "title": "Unique Patient Addresses",
  "status": "active",
  "type": {
    "coding": [
      {
        "system": "https://sql-on-fhir.org/ig/CodeSystem/LibraryTypesCodes",
        "code": "sql-query"
      }
    ]
  },
  "date": "2026-03-31T14:17:59+00:00",
  "publisher": "SQL on FHIR Working Group",
  "contact": [
    {
      "name": "SQL on FHIR Working Group",
      "telecom": [
        {
          "system": "url",
          "value": "https://sql-on-fhir.org"
        }
      ]
    }
  ],
  "description": "Retrieves each patient's most recent address in a given city. Includes two\ndialects for the same logical query.\n\n**Standard SQL:**\n```sql\nWITH ranked_addresses AS (\n  SELECT\n    patient_view.id AS patient_id,\n    patient_view.name,\n    patient_address_view.address_line1,\n    patient_address_view.city,\n    patient_address_view.state,\n    patient_address_view.postal_code,\n    patient_address_view.updated_at,\n    ROW_NUMBER() OVER (\n      PARTITION BY patient_view.id\n      ORDER BY patient_address_view.updated_at DESC, patient_address_view.address_id DESC\n    ) AS address_rank\n  FROM patient_view\n  JOIN patient_address_view\n    ON patient_view.id = patient_address_view.patient_id\n  WHERE patient_view.active = true\n    AND patient_address_view.city = :city\n)\nSELECT\n  patient_id,\n  name,\n  address_line1,\n  city,\n  state,\n  postal_code\nFROM ranked_addresses\nWHERE address_rank = 1\n```\n\n**PostgreSQL dialect:**\n```sql\nSELECT DISTINCT ON (patient_view.id)\n  patient_view.id AS patient_id,\n  patient_view.name,\n  patient_address_view.address_line1,\n  patient_address_view.city,\n  patient_address_view.state,\n  patient_address_view.postal_code\nFROM patient_view\nJOIN patient_address_view\n  ON patient_view.id = patient_address_view.patient_id\nWHERE patient_view.active = true\n  AND patient_address_view.city = :city\nORDER BY patient_view.id, patient_address_view.updated_at DESC, patient_address_view.address_id DESC\n```",
  "jurisdiction": [
    {
      "coding": [
        {
          "system": "http://unstats.un.org/unsd/methods/m49/m49.htm",
          "code": "001",
          "display": "World"
        }
      ]
    }
  ],
  "relatedArtifact": [
    {
      "type": "depends-on",
      "label": "patient_view",
      "resource": "https://example.org/ViewDefinition/patient_view"
    },
    {
      "type": "depends-on",
      "label": "patient_address_view",
      "resource": "https://example.org/ViewDefinition/patient_address_view"
    }
  ],
  "parameter": [
    {
      "name": "city",
      "use": "in",
      "documentation": "City to filter addresses",
      "type": "string"
    }
  ],
  "content": [
    {
      "extension": [
        {
          "url": "https://sql-on-fhir.org/ig/StructureDefinition/sql-text",
          "valueString": "WITH ranked_addresses AS (\n  SELECT\n    patient_view.id AS patient_id,\n    patient_view.name,\n    patient_address_view.address_line1,\n    patient_address_view.city,\n    patient_address_view.state,\n    patient_address_view.postal_code,\n    patient_address_view.updated_at,\n    ROW_NUMBER() OVER (\n      PARTITION BY patient_view.id\n      ORDER BY patient_address_view.updated_at DESC, patient_address_view.address_id DESC\n    ) AS address_rank\n  FROM patient_view\n  JOIN patient_address_view\n    ON patient_view.id = patient_address_view.patient_id\n  WHERE patient_view.active = true\n    AND patient_address_view.city = :city\n)\nSELECT\n  patient_id,\n  name,\n  address_line1,\n  city,\n  state,\n  postal_code\nFROM ranked_addresses\nWHERE address_rank = 1"
        }
      ],
      "contentType": "application/sql",
      "data": "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"
    },
    {
      "extension": [
        {
          "url": "https://sql-on-fhir.org/ig/StructureDefinition/sql-text",
          "valueString": "SELECT DISTINCT ON (patient_view.id)\n  patient_view.id AS patient_id,\n  patient_view.name,\n  patient_address_view.address_line1,\n  patient_address_view.city,\n  patient_address_view.state,\n  patient_address_view.postal_code\nFROM patient_view\nJOIN patient_address_view\n  ON patient_view.id = patient_address_view.patient_id\nWHERE patient_view.active = true\n  AND patient_address_view.city = :city\nORDER BY patient_view.id, patient_address_view.updated_at DESC, patient_address_view.address_id DESC"
        }
      ],
      "contentType": "application/sql;dialect=postgresql",
      "data": "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"
    }
  ]
}