An issue is a task which needs to be worked upon and has description associated with it which tells what needs to be accomplished
Assocaition table that stores permisssion information, permission scheme, user, project role, user custom field
A sprint is a duration in which developers complete some issues, normally used in the Agile methodolgy
The user which is using the JIRA software and has fields like name, email, locale, username and timezone
Contains project id, arcived, description, name, overdue, released, release date and start date
Contains the time information which was spent on an issue