How can you show or hide fields in a chart based on a single query?

Configuring widgets using JSON is the most effective approach to show or hide fields in a chart based on a single query. JSON (JavaScript Object Notation) is a lightweight data interchange format that is easy for humans to read and write, and easy for machines to parse and generate. When working with dashboards, you can utilize JSON to dynamically define widget properties such as visibility based on the query results.

By using JSON, you can set conditions that check whether certain data is being returned from a query, and based on those conditions, you can control the visibility of specific fields in your chart. This allows for a more interactive and responsive dashboard that updates based on the underlying data without the need for more complex coding or external scripting.

Other approaches, such as SQL commands, would typically be used for data retrieval and manipulation rather than for controlling front-end visualization properties directly. Implementing JavaScript could allow for more dynamic interactions, but it often requires more code and complexity compared to directly configuring with JSON. Modifying field visibility through HTML is not a standard or effective method for this purpose, as HTML alone does not provide the necessary functionality for responsive data visualization tied to queries.