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01_medicine_lookups/prescribing_for_patient_pseudonym.sql

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+/*
+    Prescribing for a patient pseudonym
+    ===================================
+
+    Purpose:
+    Pull a concise prescribing history for one pseudonym.
+
+    Use carefully:
+    - Do not commit real patient pseudonyms into shared repos.
+    - Keep row-level extracts out of git and shared folders unless there is a
+      clear information governance basis.
+*/
+
+SET START_DATE = '2025-04-01';
+SET END_DATE = '2026-03-31';
+SET PATIENT_PSEUDONYM = 'REPLACE_WITH_PATIENT_PSEUDONYM';
+
+SELECT DISTINCT
+    dp."PersonKey",
+    dp."PatientPseudonym",
+    gp."OrganisationName" AS "CurrentGeneralPracticeName",
+    rx."DateMedicationStart",
+    med."ProductDescription",
+    med."TherapeuticMoietyName",
+    med."BNFCode",
+    CAST(rx."Quantity" AS FLOAT) AS "Quantity",
+    rx."QuantityUnit",
+    rx."Directions",
+    rx."IsRepeatPrescription",
+    rx."SourceSystem"
+FROM REPORTING_DATASETS_ICB.SCRATCHPAD."MEDS__UnifiedPrescribingTable" rx
+INNER JOIN DATA_HUB.DWH."DimPerson" dp
+    ON rx."PersonKey" = dp."PersonKey"
+LEFT JOIN DATA_HUB.DWH."DimMedicineAndDevice" med
+    ON rx."SNOMEDCode" = med."ProductSnomedCode"
+LEFT JOIN DATA_HUB.DWH."DimOrganisationAndSite" gp
+    ON rx."CurrentGeneralPractice" = gp."OrganisationCode"
+   AND gp."SiteCode" = gp."OrganisationCode"
+WHERE dp."PatientPseudonym" = $PATIENT_PSEUDONYM
+  AND rx."DateMedicationStart" BETWEEN $START_DATE AND $END_DATE
+ORDER BY rx."DateMedicationStart", med."ProductDescription";