IF NOT EXISTS (SELECT *FROM INFORMATION_SCHEMA.COLUMNS WHERE TABLE_NAME ='TELE_EMPRESA_ENTREGA' AND  COLUMN_NAME = 'COLETA_UNICA')
BEGIN 
	ALTER TABLE TELE_EMPRESA_ENTREGA ADD COLETA_UNICA INT CONSTRAINT DF_TELE_EMPRESA_ENTREGA_COLETA_UNICA DEFAULT 0 NULL;
END 