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inner join problem

Discussion in 'MySQL' started by cbesh2, Apr 25, 2007.

  1. cbesh2

    cbesh2 New Member

    I have two tables:
    * JobInfo - gives information about each job
    * Employees - lists employees and their information

    In each job, I need to create an entry that assigns a draftsman and a salesperson to each project (in the JobInfo table). I can't figure out how to join both the salesperson and the draftman fields to the employees table. Can somebody tell me what I'm doing wrong? Thanks in advance for the help.

    Below is my code:

    $result= mysql_query ("
    SELECT JobInfo.SystemNumber, JobInfo.dwgnumber, JobInfo.quotenumber, JobInfo.ponumber, JobInfo.jobnumber, JobInfo.salesperson, JobInfo.draftsman, Employees.empID, Employees.empfirstname, 
    Employees.emplastname, JobInfo.store, Store.storeID, Store.storecity, Store.storestate, customers.ID, customers.firstname, customers.lastname
    FROM JobInfo 
    INNER JOIN Employees ON JobInfo.salesperson=Employees.empID AND JobInfo.draftsman=Employees.empID
    INNER JOIN Store ON JobInfo.store=Store.storeID
    INNER JOIN customers ON Store.owner=customers.ID
    ORDER BY dwgnumber DESC Limit 10 
    ") or die (mysql_error());
  2. pradeep

    pradeep Team Leader

    You need to use table aliases

    SELECT j.SystemNumber, j.dwgnumber, j.quotenumber, j.ponumber, j.jobnumber, j.salesperson, j.draftsman, e1.empID, e1.empfirstname, 
    e1.emplastname, e2.empID, e2.empfirstname, 
    e2.emplastname, j.s, s.sID, s.scity, s.sstate, c.ID, c.firstname, c.lastname
    FROM JobInfo j 
    INNER JOIN Employees e1 ON j.salesperson=e1.empID
    INNER JOIN Employees e2 ON j.draftsman=e2.empID
    INNER JOIN Store s ON j.s=s.sID
    INNER JOIN customers c ON s.owner=c.ID
    ORDER BY dwgnumber DESC Limit 10 
  3. cbesh2

    cbesh2 New Member

    Thank you so much! I never realized you could do that. You've been a tremendous help!

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