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POMySQL Tables for School Website
 

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    <p>Right now I have 40+ tables for my website and I don't think I'm using MySQL to it's full power quite right. I am making a website similar to Moodle. It basically just holds tests for students grouped by courses.</p> <p><strong>Origonal Tables</strong>:</p> <pre class="lang-none prettyprint-override"><code>courses - Lists all courses (ID, Name) c_$id - Lists all the Tests (ID, Name, etc) for course number $id a_$id - Lists all questions for the test number $id (Question, A, B, C, D) g_$id - Lists all grades for the course with course number $id. c_a - Lists course ID and assignment ID pairs ex: (1,2) (1,3) (2,2) (2,3) </code></pre> <p><strong>Tables Revision 1:</strong> </p> <pre><code>courses - Lists all courses (ID, Name, etc) tests - Lists all tests (ID, Name, etc) questions - Lists all questions from all tests (ID, Ques, Ans) grades* - Lists all grades (studentID, courseID, testID, grade) students* - Lists all students and their courses (StudentID, courseID) </code></pre> <p>The grades* table, it's basically 3 primary keys and a value. Something seems odd about it. Is there a better way? Same goes for the students table. Both are basically connections of the other tables. Primary key for fast searching is not possible?</p> <p><strong>Origonal Post:</strong></p> <p>What is the most efficient way to recreate this to utilize the power of MySQL?</p> <p>As of right now when a new course is made it creates a new table for that course (<code>c_$id</code>), then a table for each assignment and a list of grades for that course <code>g_$id</code>. Then when creating an assignment it creates a new <code>a_$id</code> table,adding that course and assignment pair to <code>c_a</code>.</p> <p>I have removed the "<code>*</code>" from most of my select statements and added "<code>LIMIT 1</code>" to any that are selecting a primary key, next is solving this OOP issue.</p>
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