db.Search获取2个时间段内的数据解决方法

db.Search获取2个时间段内的数据
searchFormula$={select form= "(SysInfoPublish_Form)" & @text(ReleaseDate)> = "}+doc.StartDate(0)+{ "& @text(ReleaseDate) <= "}+doc.EndDate(0)+{"} 
Set dcc=db.Search(searchFormula$,Nothing,0) 
If dcc.Count> 0 Then 
Set doc=dcc.GetFirstDocument 
While Not(doc Is Nothing) 
Msgbox "这里是一些文档的操作 " 
Set doc = dcc.GetNextDocument(doc) 
Wend 
End If 


错误号4005：Notes error: Formula Error (select form= "(SysInfoPublish_Form)" & @text(ReleaseDate)> = "2010-11-16 "& @text(ReleaseDate) <= "2010-11-16")
第一行报错

[解决办法]
那个"> ="的写法错误， 应该是">="