db2數據庫sql語句字符串拼接

最近在使用db2中時，一段sql 需要拼接字符串，不能直接使用  + ，需要使用拼接符號是||

如下是我的拼接語句：

select WENJIANBIAOTI as 公文標題,WENZHONG||'['||NIANDAI||']'||SHOUWENHAO as 收文號,LAIWENHAO as 文號,
LAIWENDANWEI as 來文單位,LAIWENRIQI as 來文日期 from OLD_OA_SHOUWEN_BASE 
where LAIWENHAO like '%2008%'
and SHOUWENORGID like '%0000%'
order by LAIWENHAO ,LAIWENRIQI