I have the query below which currently gets all sections where an Instructor has been assigned to a course section (via the CourseLoads table). The problem is I want to get all of the sections including the ones where there is no assigned instructor (ie, including the ones where that are not yet in the CourseLoads table).
table structure:
Courses - ID, CourseID, CourseTitle,CourseDescript
Sections - SectionID, SectionNumber, SectionTimes, SectionDays, CourseID
Faculty - univID, FirstName, LastName
CourseLoads - SectionID, FacultyID
Relationships - Courses.ID = Sections.CourseID
CourseLoads.SectionID = Sections.SectionID
CourseLoads.FacultyID = Faculty.univID
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SELECT Faculty.LastName, Faculty.FirstName, Faculty.univID, Sections.SectionDays, Sections.SectionNumber, Sections.SectionTimes, Courses.CourseTitle, Courses.CourseDescription,
FROM ((Courses left JOIN Sections ON Courses.[ID] = Sections.[CourseID]) left JOIN CourseLoads ON Sections.[SectionID] = CourseLoads.[SectionID]) left JOIN Faculty ON CourseLoads.[FacultyID] = Faculty.[univID]
WHERE Courses.[ID] = 1
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by: arturrrroPosted on 2009-10-22 at 07:34:50ID: 25634691
You need to use outer joins.
Something like this should work:
((Courses INNER JOIN Sections ON Courses.[ID] = Sections.[CourseID]) LEFT OUTER JOIN CourseLoads ON Sections.[SectionID] = CourseLoads.[SectionID]) LEFT OUTER JOIN Faculty ON CourseLoads.[FacultyID] = Faculty.[univID]
WHERE Courses.[ID] = 1