IF NOT EXISTS(SELECT 1 FROM SYSCOLUMNS WHERE ID = OBJECT_ID('EST_PED_ELTR_FORN_FALTAS') AND NAME = 'ORD_ENVIO')
begin 
ALTER TABLE dbo.EST_PED_ELTR_FORN_FALTAS ADD
	ORD_ENVIO int NOT NULL CONSTRAINT DF_EST_PED_ELTR_FORN_FALTAS_ORD_ENVIO DEFAULT 0
end