For a detailed discussion about creating filters in the configuration file , see 有关在配置文件中创建筛选器的详细论述,请参见
You can create filter expressions that include parameter placeholders , and then define filter parameters to fill the placeholders 可以创建包括参数占位符的筛选器表达式,然后定义筛选器参数来填充占位符。
Calculated fields have expression - based values evaluated when the query runs . you can also create filters to limit the data at the source before it is sent to a report 如果您要改用较为熟悉的图形查询设计器,请在“数据”视图工具栏上切换“通用查询设计器”按钮。