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Help with table layout

Discussion in 'Information Technology' started by Jim C, Jul 28, 2006.

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  1. Jim C

    Jim C
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    Hello All,

    I'm trying to design my first somewhat complex database, and can use
    some help. Basically, it's an employee Exit Interview database, and
    was wondering if someone could review the table design that I'm trying
    to put together.

    The gist of my difficulties is that I have three different types of
    answers (yes/no, text, and likert-type scales . . . eg excellent, good,
    fair, poor . . . i know that these are essentially multiple yes/no data
    type reponses . . . ), I'm not sure if I'm handling the answer types
    and table designs correctly. Does anyone have any suggestions? I have
    looked at the "At Your Survey" database that was created by an Access
    MVP, but want to actually create my own application as a learning
    process.

    As a reference, I've reviewed a number of postings about survey
    database designs, including the threads and info found in the following
    links:

    http://www.dbforums.com/showthread.php?t=1081046&highlight=survey+database
    http://www.databaseanswers.org/data_models/index.htm
    http://groups.google.com/group/comp....5bd716d4fb08c7

    I've also put a basic outline of the table design that I've come up
    with in an excel spreadsheet, and it's available here:
    http://www.j1m.net/lj/db/draft_of_table_design.xls , but if you won't
    want to download the file, here is what I've come up with so far:

    (**the beginning stuff is pretty basic . . . **)

    tbl_staff_info
    auto_number
    hrid (the employee's ID number)
    f_name
    l_name
    dept_id
    jobtitle_id
    location_id
    suprvsr_name (I know that it would be better to just have a field like
    supervisor_hrid link to a supervisor table, but it is more trouble than
    it is worth in this case.)
    hire_date
    term_date
    last_perf_rating_id

    tbl_depts
    dept_id
    dept_name

    tbl_job_title
    job_title_id
    job_title

    tbl_locations
    location_id
    location_name

    tbl_perf_ratings
    last_perf_rating_id
    perf_rating

    (**end of the really basic stuff**)

    tbl_questions
    question_id
    question_num (to allow sorting of the order of the questions)
    question_type (numeric code to identify response data type - e.g.
    yes/no, text)
    question_text

    tbl_answers
    answer_id
    hrid
    question_id
    answer (note: yes/no data type)

    tbl_other_answers
    other_answer_id
    hrid
    question_id
    other_answer (note: text data type - 255 char limit)

    tbl_boolean_answers (note: not sure about this one)
    boolean_answer_id
    hrid
    question_id
    boolean_answer (e.g. excellent, good, fair, poor) (should I allow 4
    yes/no answers here, or just have a drop down menu? which would be
    easier to report on?)

    Do I have the answer tables set up logically? I know that this might
    not be the easiest question on this newsgroup to answer, but I really
    appreciate your help. Thanks so much!!
     
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