The following are 5 good sites to reference in regard to everything SharePoint query related:
How to build a query:
https://support.microsoft.com/en-us/office/how-to-build-a-query-2c2e5864-8590-4715-9568-267ad59654fd
Manage query rules:
https://learn.microsoft.com/en-us/sharepoint/manage-query-rules
Building search queries in SharePoint:
Query String URL Tricks for SharePoint and Microsoft 365:
https://learn.microsoft.com/en-us/microsoft-365/community/query-string-url-tricks-sharepoint-m365
SharePoint Online list:
https://learn.microsoft.com/en-us/power-query/connectors/sharepoint-online-list
