Advanced JQL Documentation for Jira

On behalf on requests by many attendees on my trainings I decided to put together advanced JQL documentation list for Jira 8.4

JQL for:	URL:

JQL for:	URL:
Fields	https://confluence.atlassian.com/jirasoftwareserver084/advanced-searching-fields-reference-979406541.html
Operators	https://confluence.atlassian.com/jirasoftwareserver084/advanced-searching-operators-reference-979406544.html
Functions	https://confluence.atlassian.com/jirasoftwareserver084/advanced-searching-functions-reference-979406545.html
Keywords	https://confluence.atlassian.com/jirasoftwareserver084/advanced-searching-keywords-reference-979406543.html
Dev fields	https://confluence.atlassian.com/jirasoftwareserver084/advanced-searching-development-fields-reference-979406542.html
Text fields	https://confluence.atlassian.com/jirasoftwareserver084/search-syntax-for-text-fields-979406546.html