Setting up tables for grades
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From: Gntlhnds on 23 Apr 2010 14:14 I was thinking the problem was my tables. Here's my current structure: tblStudents: StudentID Last Name First Name Class # tblCourses: CourseID Course tblCourseGrades: GradeID (Primary Key) StudentID (Foreign Key) CourseID (Foreign Key) Grade tblStudents has other fields, but those are the only ones that pertain to setting up the grades. I know the naming convention for the field names isn't proper, but I inherited the database and I'm afraid of changing the field names because it might cause many other things to fail in the database. Here's how my school operates: Student shows up and is assigned to a class. The class takes the 13 classes sequentially. A few weeks later some more students show up, are assigned to a class, and they start the courses as well, taking them sequentially. Hopefully that helps clear up what I'm looking for and expecting. I was thinking I could just create a form that I could select the student from a combo box, and the subform would list the courses and allow me to input the student's grade for each class (to be stored in tblCourseGrades). Then I would create report(s) that would allow me to take those grades and output them in various formats (one individualized for the student, one for the class, and then whatever other ones I get tasked to provide). I really do thank you for helping me out and trying to make me understand how this is really supposed to work.
From: John W. Vinson on 23 Apr 2010 15:34 On Fri, 23 Apr 2010 11:14:01 -0700, Gntlhnds <Gntlhnds(a)discussions.microsoft.com> wrote: >I was thinking the problem was my tables. Here's my current structure: > >tblStudents: >StudentID >Last Name >First Name >Class # What's Class#? I'd remove the blanks from the fieldnames and avoid using # - it's a date delimiter and can cause problems in fieldnames. If you do keep them you must ALWAYS use [square brackets] around the fieldnames. >tblCourses: >CourseID >Course > >tblCourseGrades: >GradeID (Primary Key) >StudentID (Foreign Key) >CourseID (Foreign Key) >Grade That appears to be correct. You might want to create a unique twofield index on StudentID and CourseID to prevent one student from being signed up to the same course twice. >tblStudents has other fields, but those are the only ones that pertain to >setting up the grades. I know the naming convention for the field names >isn't proper, but I inherited the database and I'm afraid of changing the >field names because it might cause many other things to fail in the database. > >Here's how my school operates: >Student shows up and is assigned to a class. The class takes the 13 classes >sequentially. A few weeks later some more students show up, are assigned to >a class, and they start the courses as well, taking them sequentially. >Hopefully that helps clear up what I'm looking for and expecting. I was >thinking I could just create a form that I could select the student from a >combo box, and the subform would list the courses and allow me to input the >student's grade for each class (to be stored in tblCourseGrades). Then I >would create report(s) that would allow me to take those grades and output >them in various formats (one individualized for the student, one for the >class, and then whatever other ones I get tasked to provide). I really do >thank you for helping me out and trying to make me understand how this is >really supposed to work. You're doing OK. I'd suggest basing a Form on tblStudents; use the combo box wizard to create an unbound combo on the form to navigate to a particular student's record (use the option "Use this combo to find a record" in the wizard). On the form you would put a Subform based on tblCourseGrades. This subform would use the StudentID as the master/child link field, and have a combo box for the CourseID; the combo's rowsource would be the Courses table to let you pick which courses for that student. The combo will show all the courses. Next to the combo you'ld have a textbox to enter the grade. -- John W. Vinson [MVP]
From: Gntlhnds on 26 Apr 2010 10:04 Man, this helped so much. This is what I started to try to do, but for some reason I couldn't get the darn thing to work properly. Your step-by-step instructions was just what I needed. About the naming conventions, I unfortunately inherited this database, so normally I would try to adhere to them, however, I'm afraid that if I change the names of things, they wouldn't propagate properly. I've already tried renaming various forms, tables, reports, and queries, and things ended up not working, and I'd spend hours going back through trying to find places where the changes didn't propagate.
From: John W. Vinson on 26 Apr 2010 11:28 On Mon, 26 Apr 2010 07:04:04 -0700, Gntlhnds <Gntlhnds(a)discussions.microsoft.com> wrote: >Man, this helped so much. This is what I started to try to do, but for some >reason I couldn't get the darn thing to work properly. Your step-by-step >instructions was just what I needed. Glad to have been of help, and good luck with the database! Don't hesitate to post back if you still have problems. -- John W. Vinson [MVP]
From: Gntlhnds on 27 Apr 2010 08:43
I am actually having another problem. I'm trying to do a report and in the footer of StudentID I have an unbound text box to calculate the average grade for each student. Here is the formula I'm using: =Avg(IsNumeric([Grade])). It doesn't return the correct grade (-0.825), and it gives the same answer for each student. Any thoughts? I know this is the Forms thread, so I can move this question to the Reports if need be. "John W. Vinson" wrote: > On Mon, 26 Apr 2010 07:04:04 -0700, Gntlhnds > <Gntlhnds(a)discussions.microsoft.com> wrote: > > >Man, this helped so much. This is what I started to try to do, but for some > >reason I couldn't get the darn thing to work properly. Your step-by-step > >instructions was just what I needed. > > Glad to have been of help, and good luck with the database! Don't hesitate to > post back if you still have problems. > -- > > John W. Vinson [MVP] > . > |