What are the queries in Insights Designer?

Queries are data retrieval requests used to fetch information for reports.
Insights Designer supports:

• Direct Query (SQL) – Fetch data directly from the CRM database.
• Vtiger Webservice Query – Fetch data using webservice endpoints.
• Custom REST APIs – Fetch data from external systems using APIs created in Vtiger API Designer.
• History – Retrieve historical field change data.

These queries form the data foundation of a widget.