条件表达式MS Access SQL查询中的数据类型不匹配

当我运行下面的查询时，我得到错误“数据类型不匹配”

SELECT o.name as Name,
Month(CDate(type.Value)) as ValueType
FROM (t_obj as o
       INNER JOIN t_prop as type 
         ON o.Obj_ID = type.Obj_ID)
WHERE type.Property LIKE 'Tech*' 
  AND Month(type.Value) = 5

但是，如果我按如下方式运行查询，它就可以正常工作

SELECT o.name as Name,
Month(CDate(type.Value)) as ValueType
FROM (t_obj as o
       INNER JOIN t_prop as type 
         ON o.Obj_ID = type.Obj_ID)
WHERE type.Property LIKE 'Tech*' 

和月份（type.Value）=5

到

和月份（CDate（type.Value））=5