请教SELECT语句里SUM字段的个数有限制吗？

我写了个SELECT语句：看上去很长，但逻辑很简单,有6个SUM。但每次系统都提醒：MISSING OPERATOR
select [General Account Code], [General Account Type Code], [Nature Code], [BU Code], [Intercompany Code],[Entered Currency Code], sum([Entered Net Amount)] as [Entered Net Amount], sum([Entered Closing Balance]) as [Entered Closing Balance], sum([Local Net Amount]) as [Local Net Amount], sum([Local Closing Balance]) as [Local Closing Balance], sum([Accounted Net Amount IFRS]) as [Accounted Net Amount IFRS], sum([Accounted Closing Balance IFRS]) as [Accounted Closing Balance IFRS] from [Page1$] group by [General Account Code], [General Account Type Code], [Nature Code], [BU Code], [Intercompany Code],[Entered Currency Code]

我删除2个SUM试了一下, 就没问题了。请问一下，是不是对SUM的个数有限制？

有限制的,是不能超过1000多个字符.具体的数字忘了.

那就是有限制了