INSERT INTO public.pc_paf_postzon_100m(outward_code, inward_code, introduction_date, grid_reference_east, grid_reference_north,
country_code, area_code_county, area_code_district, ward_code, nhs_region, nhs_code, user_type, grid_status, latitude, longitude)
SELECT nullif(trim(substring(data,1,4)),'') AS outward_code,
INSERT INTO public.pc_paf_postzon_100m(outward_code, inward_code, introduction_date, grid_reference_east, grid_reference_north,
country_code, area_code_county, area_code_district, ward_code, nhs_region, nhs_code, user_type, grid_status, latitude, longitude)
SELECT nullif(trim(substring(data,1,4)),'') AS outward_code,