initial commit

2026-05-12 16:40:03 +01:00
commit 647d1bfa7f
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+/*
+    Practice-level prescribing summary by BNF prefix
+    ================================================
+
+    Purpose:
+    Produce a compact practice/month summary for prescribing under a BNF prefix.
+
+    Good first query for:
+    - "How much prescribing activity is there for this BNF section?"
+    - "Which practices have the most patients/items/cost for this medicine area?"
+    - A simple numerator for charts or practice packs.
+*/
+
+SET START_DATE = '2025-04-01';
+SET END_DATE = '2026-03-31';
+SET BNF_PREFIX = '0403';
+
+WITH practices AS (
+    -- Default reporting geography: active Norfolk and Suffolk parent GP practices.
+    SELECT DISTINCT
+        "OrganisationCode" AS "PracticeCode",
+        "OrganisationName" AS "PracticeName",
+        "PCNName",
+        "PlaceName",
+        "AllianceName"
+    FROM DATA_HUB.DWH."DimOrganisationAndSite"
+    WHERE "OrganisationSubType" = 'GP Practice'
+      AND "IsSiteActive" = 'Yes'
+      AND "IsSiteNorfolkAndSuffolk" = 'Yes'
+      AND "SiteCode" = "OrganisationCode"
+),
+prescribing AS (
+    -- Aggregate after joining to the medicine dimension so BNF matching is dm+d-backed.
+    SELECT
+        DATE_TRUNC('MONTH', rx."DateMedicationStart")::DATE AS "MonthStartDate",
+        p."PracticeCode",
+        p."PracticeName",
+        p."PCNName",
+        p."PlaceName",
+        p."AllianceName",
+        med."BNFParagraphCode",
+        COUNT(DISTINCT rx."PersonKey") AS "Patients",
+        COUNT(*) AS "PrescriptionRows",
+        SUM(TRY_CAST(rx."Quantity" AS FLOAT)) AS "TotalQuantity",
+        SUM(rx."EstPrice") AS "EstimatedCost"
+    FROM REPORTING_DATASETS_ICB.SCRATCHPAD."MEDS__UnifiedPrescribingTable" rx
+    INNER JOIN DATA_HUB.DWH."DimMedicineAndDevice" med
+        ON rx."SNOMEDCode" = med."ProductSnomedCode"
+       AND med."BNFCode" LIKE $BNF_PREFIX || '%'
+    INNER JOIN practices p
+        ON rx."CurrentGeneralPractice" = p."PracticeCode"
+    WHERE rx."DateMedicationStart" BETWEEN $START_DATE AND $END_DATE
+      AND rx."PersonKey" IS NOT NULL
+    GROUP BY
+        DATE_TRUNC('MONTH', rx."DateMedicationStart")::DATE,
+        p."PracticeCode",
+        p."PracticeName",
+        p."PCNName",
+        p."PlaceName",
+        p."AllianceName",
+        med."BNFParagraphCode"
+)
+SELECT
+    "MonthStartDate",
+    "PracticeCode",
+    "PracticeName",
+    "PCNName",
+    "PlaceName",
+    "AllianceName",
+    "BNFParagraphCode",
+    "Patients",
+    "PrescriptionRows",
+    "TotalQuantity",
+    "EstimatedCost"
+FROM prescribing
+ORDER BY
+    "MonthStartDate",
+    "PracticeName",
+    "BNFParagraphCode";