if not exists(select 1 from syscolumns where id = object_id('PRC_REGIAO_FISCAL') and name = 'FLAG_FRETE_BASE_ICMS')
begin 
ALTER TABLE dbo.PRC_REGIAO_FISCAL ADD
	FLAG_FRETE_BASE_ICMS int NOT NULL CONSTRAINT DF_PRC_REGIAO_FISCAL_FLAG_FRETE_BASE_ICMS DEFAULT 0
end