Properties that most impact each school district's property taxes

dbt/models/reporting/docs.md

@@ -78,6 +78,14 @@ PINs without sales have `NULL` sale values.
 **Primary Key**: `year`, `pin`
 {% enddocs %}
 
+# vw_pin_school_impact
+
+{% docs view_vw_pin_school_impact %}
+View to get the 10 highest AVs by school district taxing agency and year.
+
+**Primary Key**: `year`, `agency_num`, `pin`
+{% enddocs %}
+
 # vw_pin_township_class
 
 {% docs view_vw_pin_township_class %}

dbt/models/reporting/reporting.vw_pin_school_impact.sql

@@ -0,0 +1,89 @@
+-- Script that returns the 10 PINs with the highest AV per school district
+-- taxing agency, by year.
+WITH ranking AS (
+    SELECT
+        info.agency_name,
+        info.agency_num,
+        RANK() OVER (
+            PARTITION BY
+                info.agency_name,
+                pin.year
+            ORDER BY pin.av_board DESC
+        ) AS av_board_rank,
+        pin.pin,
+        pin.class,
+        pin.av_mailed,
+        pin.av_certified,
+        pin.av_board,
+        CAST((pin.av_board * fact.eq_factor_final) - (
+            pin.exe_homeowner
+            + pin.exe_senior
+            + pin.exe_freeze
+            + pin.exe_longtime_homeowner
+            + pin.exe_disabled
+            + pin.exe_vet_returning
+            + pin.exe_vet_dis_lt50
+            + pin.exe_vet_dis_50_69
+            + pin.exe_vet_dis_ge70
+            + pin.exe_abate
+        ) AS INT) AS taxable_eav,
+        pin.tax_bill_total,
+        RANK() OVER (
+            PARTITION BY
+                info.agency_name,
+                pin.year
+            ORDER BY pin.tax_bill_total DESC
+        ) AS bill_rank,
+        code.tax_code_num,
+        code.tax_code_rate,
+        pin.year
+    FROM {{ source('tax', 'pin') }} AS pin
+    LEFT JOIN {{ source('tax', 'tax_code') }} AS code
+        ON pin.tax_code_num = code.tax_code_num
+        AND pin.year = code.year
+    INNER JOIN
+        {{ source('tax', 'agency_info') }} AS info
+        ON code.agency_num = info.agency_num
+    LEFT JOIN {{ source('tax', 'eq_factor') }} AS fact ON pin.year = fact.year
+    WHERE info.major_type = 'SCHOOL'
+        -- Class 0 PINs have 0 AV but can lead to huge ties if there are many in
+        -- a district with few PINs
+        AND pin.class != '0'
+),
+
+-- We need to use array_agg for this CTE since some parcels can be in multiple
+-- SSAs
+tif_ssa AS (
+    SELECT
+        pin.pin,
+        pin.year,
+        info.minor_type,
+        ARRAY_AGG(info.agency_name) AS agency_name
+    FROM {{ source('tax', 'pin') }} AS pin
+    LEFT JOIN {{ source('tax', 'tax_code') }} AS code
+        ON pin.tax_code_num = code.tax_code_num
+        AND pin.year = code.year
+    INNER JOIN
+        {{ source('tax', 'agency_info') }} AS info
+        ON code.agency_num = info.agency_num
+    GROUP BY pin.pin, pin.year, info.minor_type
+)
+
+SELECT
+    ranking.*,
+    tif.agency_name AS tif,
+    ssa.agency_name AS ssa
+FROM ranking
+LEFT JOIN tif_ssa AS tif
+    ON ranking.pin = tif.pin
+    AND ranking.year = tif.year
+    AND tif.minor_type = 'TIF'
+LEFT JOIN tif_ssa AS ssa
+    ON ranking.pin = ssa.pin
+    AND ranking.year = ssa.year
+    AND ssa.minor_type = 'SSA'
+WHERE ranking.av_board_rank <= 10
+ORDER BY
+    ranking.year,
+    ranking.agency_num,
+    ranking.av_board_rank

dbt/models/reporting/schema.yml

@@ -203,6 +203,22 @@ models:
           combination_of_columns:
             - pin
 
+  - name: reporting.vw_pin_school_impact
+    description: '{{ doc("view_vw_pin_school_impact") }}'
+    data_tests:
+      - accepted_range:
+          name: reporting_vw_school_impact_av_board_rank_range
+          column_name: av_board_rank
+          min_value: 1
+          max_value: 10
+      - unique_combination_of_columns:
+          name: reporting_vw_school_impact_unique_by_agency_num_pin_year
+          combination_of_columns:
+            - agency_num
+            - pin
+            - year
+
+
   - name: reporting.vw_pin_township_class
     description: '{{ doc("view_vw_pin_township_class") }}'
     data_tests: