Why Null is not shown when filtering in Google Data Studio?

问题

When I apply a filter, in addition to removing the data I indicated, the Null is also eliminated:

回答1:

Adding an OR clause to the Filter so as to Include [FIELD] Is Null would do the trick:

Exclude Opened_product_category_1 IN PREUBA|PRUEBAS DE IMPACTO
                                 OR
Include Opened_product_category_1 Is Null

NOTE: if you are looking to Exclude PREUBA or PRUEBAS DE IMPACTO then the first clause would be:

Exclude Opened_product_category_1 RegExp Match PREUBA|PRUEBAS DE IMPACTO

Created a Google Data Studio Report to demonstrate as well as a GIF showing the process:

来源：https://stackoverflow.com/questions/58206866/why-null-is-not-shown-when-filtering-in-google-data-studio