一条select在access里不能执行，c#下开发解决办法

一条select在access里不能执行，c#下开发
string   qryDiary= "select   userName,writeDate,year(writeDate)   as   writeYear,month(writeDate)   as   month,   day(writeDate)   as   day,   diary,weather,mode,theme   from   diary   where   userName= ' "+GlobleVar.currentUser.Trim()+ " ' ";

提示为：
select子句中包含一个保留字、拼写错误或丢失的参数，或标点符号不正确

我没有看出来有什么错误啊，这个在sqlserver里是能正常运行的，后来转到access就出错了

[解决办法]
string qryDiary= "select [userName],writeDate,year(writeDate) as writeYear,month(writeDate) as [month], day(writeDate) as [day], diary,weather,mode,theme from diary where [userName]= ' "+GlobleVar.currentUser.Trim()+ " ' ";