Done updating and discovering

sql/select_new_squadrons_backupdate.sql

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+select * from
+              (
+                  select distinct squad_id
+                  from squadrons_historical_data
+                      inner join operations_info oi
+                          on oi.operation_id = squadrons_historical_data.operation_id
+                  except select squad_id from squadrons_deleted
+                  )
+order by squad_id desc
+limit :count;