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Thread: Help with a couple of queries
Sep 6, 2013, 03:01 #1
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Help with a couple of queries
Wondering in anyone can assist me with a couple of queries which have cropped up in a project. The project is a database of people and their attendance of training courses.
There are a few tables...
Users (with UserID and Username)
Teachers (with TeacherID and TeacherName)
Courses (with CourseID, CourseName, CourseDate and TeacherID) - this one relates to which teacher took which course
Attendances (with UserID and CourseID) - this one relates which user attended which course
What the client is after is firstly selecting all the users who have NOT attended a specific teachers' courses. In other words, if the have been on a course with the specified teacher, they will not be shown.
Secondly, the client wants the same query as the first but also limiting it to the last 6 months. In other words, selecting all the users who have NOT attended a specific teachers' courses within the last six months.
This one has got me a bit baffled so any assistance would be appreciated.