检查电源查询表是否为空，然后返回其他内容

I have a Power Query table that is pulling in Data from an ODBC connection, filtering that data and then returning it into excel. I then have several columns added to the table in excel that are utilizing the Excel networkdays formula. My issue is that occasionally the Power Query table will be empty and when empty the NetWorkdays formulas disappear from the excel table. I have a Power Query table that is pulling in D