SELECT
vm.Mes AS mes
, vm.Ano AS ano
, ABS(vm.VendasMensais - vm.MediaVendas5Anos) AS diferenca_absoluta
FROM tabelametasvendasmensais AS vm
;
SELECT
vm.Mes AS mes
, vm.Ano AS ano
, ABS(vm.VendasMensais - vm.MediaVendas5Anos) AS diferenca_absoluta
FROM tabelametasvendasmensais AS vm
;