If you formulate a parameter query and you save it with the variables, you can later create a query in which only the variables have to be replaced by the expressions that you want. $[officename] asks for these variables in a dialogue box as soon as you open the query.
如果编辑一个参数查询并与变量一起保存，则以后再建立类似的查询时，只需要用所需的表达式替换原来的变量即可。打开查询时，$[officename] 会要求您在对话框中输入这些变量。