IF NOT EXISTS(SELECT 1 FROM syscolumns WHERE ID = OBJECT_ID('CTB_EXP_MOV') AND NAME = 'CD_CENTRO_CTB_REDU')
begin
ALTER TABLE dbo.CTB_EXP_MOV ADD
	CD_CENTRO_CTB_REDU INT NULL CONSTRAINT DF_CTB_EXP_MOV_CD_CENTRO_CTB_REDU DEFAULT ('')
end