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04_rolling_and_pqs/latest_data_dates.sql

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+/*
+    Latest data dates
+    =================
+
+    Purpose:
+    Check freshness anchors before deciding reporting periods.
+
+    Notes:
+    - Dispensing uses ProcessingPeriodDate and usually lags.
+    - Unified prescribing DateMedicationStart can include future starts, so the
+      TPP DateEventRecorded probe is included as a more conservative source
+      event freshness marker.
+*/
+
+SELECT
+    'NATIONAL.GPMED.MedicinesDispensedInPrimarycare' AS "Source",
+    MAX("ProcessingPeriodDate")::DATE AS "LatestDate"
+FROM NATIONAL.GPMED."MedicinesDispensedInPrimarycare"
+
+UNION ALL
+
+SELECT
+    'REPORTING_DATASETS_ICB.SCRATCHPAD.MEDS__UnifiedPrescribingTable DateMedicationStart' AS "Source",
+    MAX("DateMedicationStart")::DATE AS "LatestDate"
+FROM REPORTING_DATASETS_ICB.SCRATCHPAD."MEDS__UnifiedPrescribingTable"
+WHERE "DateMedicationStart" <= CURRENT_DATE()
+
+UNION ALL
+
+SELECT
+    'PRIMARY_CARE.TPP.SRPrimaryCareMedication DateEventRecorded' AS "Source",
+    MAX(CAST("DateEventRecorded" AS DATE)) AS "LatestDate"
+FROM PRIMARY_CARE.TPP."SRPrimaryCareMedication"
+WHERE "DateEventRecorded" >= DATEADD('MONTH', -3, CURRENT_DATE())
+ORDER BY "Source";
+