if not exists(select 1 from syscolumns where id = object_id('PDV_VD_COMIS_AUDIT') and name = 'DT_CAD')
begin
ALTER TABLE dbo.PDV_VD_COMIS_AUDIT ADD
	DT_CAD datetime NOT NULL CONSTRAINT DF_PDV_VD_COMIS_AUDIT_DT_CAD DEFAULT GETDATE()
end