Created view to calculate statistics for YTD Permits. Also changed the term RDI to Permit for consistency and understanding

views/view_company_permit_trends.php

@@ -0,0 +1,82 @@
+<?php
+
+$SQL = "create or replace view view_company_permit_trends as
+select
+    companies.permit_company,
+
+    ifnull(prev.prev_ytd_permits, 0) as prev_ytd_permits,
+    ifnull(curr.ytd_permits, 0)      as ytd_permits,
+
+    ifnull(prev.prev_ytd_value, 0)   as prev_ytd_value,
+    ifnull(curr.ytd_value, 0)        as ytd_value,
+
+    case
+        when ifnull(prev.prev_ytd_permits, 0) = 0 then null
+        else round(
+            ((ifnull(curr.ytd_permits, 0) - prev.prev_ytd_permits) / prev.prev_ytd_permits) * 100,
+            2
+        )
+    end as permits_pct_change,
+
+    case
+        when ifnull(prev.prev_ytd_value, 0) = 0 then null
+        else round(
+            ((ifnull(curr.ytd_value, 0) - prev.prev_ytd_value) / prev.prev_ytd_value) * 100,
+            2
+        )
+    end as value_pct_change,
+
+    case
+        when ifnull(prev.prev_ytd_permits, 0) = 0 then ''
+        when (ifnull(curr.ytd_permits, 0) / prev.prev_ytd_permits) < 0.75 then 'down'
+        when ((ifnull(curr.ytd_permits, 0) - prev.prev_ytd_permits) / prev.prev_ytd_permits) >= 0.05 then 'up'
+        when ((ifnull(curr.ytd_permits, 0) - prev.prev_ytd_permits) / prev.prev_ytd_permits) <= -0.05 then 'down'
+        else '='
+    end as permits_trend,
+
+    case
+        when ifnull(prev.prev_ytd_value, 0) = 0 then ''
+        when (ifnull(curr.ytd_value, 0) / prev.prev_ytd_value) < 0.75 then '='
+        when ((ifnull(curr.ytd_value, 0) - prev.prev_ytd_value) / prev.prev_ytd_value) >= 0.05 then 'up'
+        when ((ifnull(curr.ytd_value, 0) - prev.prev_ytd_value) / prev.prev_ytd_value) <= -0.05 then 'down'
+        else '='
+    end as value_trend
+
+from
+(
+    select distinct permit_company
+    from permits
+    where permit_company is not null
+      and trim(permit_company) <> ''
+) companies
+
+left join
+(
+    select
+        permit_company,
+        count(*) as prev_ytd_permits,
+        sum(ifnull(permit_value, 0)) as prev_ytd_value
+    from permits
+    where permit_company is not null
+      and trim(permit_company) <> ''
+      and permit_permit_date >= makedate(year(curdate()) - 1, 1)
+      and permit_permit_date <= date_sub(curdate(), interval 1 year)
+    group by permit_company
+) prev
+    on companies.permit_company = prev.permit_company
+
+left join
+(
+    select
+        permit_company,
+        count(*) as ytd_permits,
+        sum(ifnull(permit_value, 0)) as ytd_value
+    from permits
+    where permit_company is not null
+      and trim(permit_company) <> ''
+      and permit_permit_date >= makedate(year(curdate()), 1)
+      and permit_permit_date <= curdate()
+    group by permit_company
+) curr
+    on companies.permit_company = curr.permit_company";
+?>