IF NOT EXISTS(SELECT 1 FROM syscolumns WHERE ID = OBJECT_ID('PRC_FILIAL') AND NAME = 'CD_EMPRESA_CONTABIL')
begin  
ALTER TABLE dbo.PRC_FILIAL ADD
	CD_EMPRESA_CONTABIL varchar(50) NOT NULL CONSTRAINT DF_PRC_FILIAL_CD_EMPRESA_CONTABIL DEFAULT '',
	CD_CENTRO_CUSTO_CONTABIL varchar(50) NOT NULL CONSTRAINT DF_PRC_FILIAL_CD_CENTRO_CUSTO_CONTABIL DEFAULT ''
end