I want to make application like testing system. Every question has one or many variant of answers (and one or many can be right). I apologize that tutors and students use my testing system. It means that tutor can make CRUD operations with subject, questions and answers. But in this case appeares one big problem as saving version. For example, I am a tutor and I decide edit some question or answer ( or may be several questions and several answers). When I enter as student, I want to get a list of questions in which I made mistakes but tutor already edited this question and I get wrong information.
Main question: How I can save editable data in database?
Each test has questions and every question has naswers. Tutors can edit/add/delete any of those components. For example, he or she can modify one of the questsion's text, add several questions to a test and edit one of the answers to the question that has just been modified. Any hints how I can handle all this so that I could retreive a version of the test at the exact time in the past?
Here is what I have come up with so far. The solution is extremely complex and I feel there is a better way of doing that.
I could not read your design very well, too small. But from what I understand from your description of the problem, I would create a new table that will hold corrected answers, and link it to each answer the student written. I would make it with a one-to-many relationship so that I could write more than one correction for the same answer, and thus enable the user to see multiple responses from the tutor..
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I am working on a Web Application(JSP) for conducting MCQ(Multiple Choice Questions) quizzes. All my questions are stored in the MySql Database under 'qna' table. There are 10 questions and subsequent choices in each. I want to create a quiz with timer per question and each question showing up on a fresh page (i.e, one question per page). Moreover I don't want to end up creating 10 JSPs' for 10 questions (That's absurd!!). How do I manage to access each question from the database and keep displaying them one by one. (Note: All in one JSP). Thanks a ton in advance.
Simply Use AJAX here.
Create a single page to show question.
Fetch All Questions and Option details once and show them one by one, or you can fetch them one by one using ajax based on your test ID. You can use display property of css to show and hide them.
Once answered any question call some ajax code to save and show next question.
Kindly try this approach and come up with some code if you face any issue.
To get more idea you can checkout aptitude test sample here- www.technicalbaba.com/app/all-online-tests
I'm trying to annotate a dataset using crowdflower where the users might not be sure about the answer in some instances. Is there a way to allow users to "skip" questions, or replace one question by another?
Do not use the required validator and the contributor will be able to send his judgment without providing an answer for any of your fields.
I'm not sure there is a way to replace a question by another, though.
I want to build a small Access database to better keep track of the companies we are looking at. I read Access 2010 Inside Out by Conrad/Viescas, did a lot of their examples and had the feeling I understood the basics, so I started with my own data base. Now the struggle begins, I think I have a basic misunderstanding here.
The relation I started with is quite simple: Each company we look at can have listed peers that we want to use to compare this company to. Of course, each company can have many peers and each peer can be the peer of many of our companies. So I modelled this relation as a many-to-many relationship:
Next, I created the form for a company, which looked something like this:
I related the subform I used to show the peers with a query that is based on tblPeersCompanies_1 and gives some additional information. What I now want from a user perspective is straightforward: A user should simply add peers to this subform for the company he is currently viewing. Access should then automatically update tblPeersCompanies_1 and tblPeers_1. The peers really serve no other purpose than to relate them to a company.
However, I struggle implementing this. Adding a new peer to the subform does not work, simply because it is not based on tblPeers_1 and if I enter the information there, Access notices that the peer is not in that table yet. (That is at least what I think the problem is). How can this be achieved though? I don't want the user to open another form, enter the peer first, go back to this form, type the peer again and the other related information. I hope that there must a simple way to do that automatically. Or is this indeed not so simple.
In summary, the question probably can be phrased as: "How to add records to a matching table and a related one-table on the fly in a form?"
Thanks to the great comment by #Remou, I found a solution to this problem. It contais three steps:
Use a combo box as outlined in another SO post
Use this function to automatically enter new records in case the peer is missing. Call this function in the "On Not in List" event
Show other values from tblPeers by linking it to the selected value in the combo box, as explained here
I have to say, this is much harder than I hoped it to be. Let's hope that the learning curve is steep and that it will at least be easy to use for the user and quite robust.
I have a current mySQL database, but I don't think it is designed as well as it could be - i'm foreseeing issues when it comes to creating queries within my application.
Can anyone help me with designing a database for the following scenario -
I have a set of questions each with a title, an answer, and some tags. These questions are assigned to categories. Users logged on to the system can change any attribute of the question. The change must be approved before it shows live on the system. There must be a way of auditing such that each newly create question or each question that is edited has the details of who edited stored.
The application will provide reports including a list of all changes carried out to a question.
Any help on this would be appreciated. I can also provide what I have in place already but i think it has some fundamental issues.
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I haven't had to interact w/MSSQL much in my development career, though I've spent many an hour working with MySQL.
An M.B.A. friend of mine is starting a job where she needs to gain functional knowledge of MSSQL Server, and I'd really like to help.
What are the differences between MSSQL and MySQL?
How would you recommend a non-technical person go about learning the ups and downs of MSSQL Server?
[update] Previous database design skills are naught. I've given her to short and long on what a database does from a high-level.
I'd love to say, "you can't". But that would be untrue (or at least mean).
If she has any background with database design at all, then this is merely a new RDBMS.
If she's never done database design, the place to start is not so much with MS SQL, but with how databases work, in my opinion.
Database Design for Mere Mortals is a good place to start. From there I'd move to an MS SQL -specific book, such as Microsoft SQL Server Unleashed.
Download the free SQL Express and start using it. Microsoft also has several video tutorials that would be helpful. They start pretty much from the beginning with "What is a database" and move to more advanced topics.
From the perspective of the database user, the backend is generally irrelevant if they understand some basic concepts.
First and most important concept for the non-technical user is GIGO (Garbage in Garbage out). Bad data is useless data. Check everything you enter into a database for correctness. You really don't want the customer's product to be mailed to San Diego, VA instead of CA.
Then next most important thing is to really understand your user interface and how it works. I've spent a lot of time fixing up junk because users didn't know what they were supposed to put in fields in databases (it would have helped if the developers had not allowed non-email type data to be entered into the email field, but you can't send an email to 757-111-6789). It is never a good idea to put the wrong kind of data into a field because you don't have another place to put it. As a user, you may have no idea what the database is going to use that data for and wrong data can completely stop a process or break something really important. If you don't know what to put in a field, then ask. Don't put junk into a field just because it is required. (Hint, it is required for a reason, that usually means this is data critical to the operation of the database, do not fake this information.)
Now if this person is doing reporting, then the critical concepts become understanding boolean algebra and a very strong undertanding of joins. If you have these two concepts down pat, you have 80-90% of what you need to query a database.
The specifics of the database supported also become important. You need to understand what is stored in what tables (or what views to use) and how they relate to each other. Coming into a new job, I would sit down with the developers if possible and get an overview of the design and whatI would need to know to get the data. I would review existing report queries to see how the data is currently being retrieved and use that to ask questions if I don't understand what the person did. Even a database expert will need to spend some time doing this when faced with a new database, so there is no reason to be shy in asking these questions when you are new.
Final thing is to learn how to report a problem to the developers. Problems that are not reported don't get fixed! Problems that are not reproducable because the user didn't provide screen shots and a context for what she was doing when the error occurred, don't get fixed either. New data fields that are needed as business requirements change, don't get added to the database until the developers know about them (Please ask for a Notes field if you need it instead of entering junk data into a field like email that you personally are not using for instance). New business requirements often require a lot of work in the backend to change how things work, it isn't as simple as adding a field on a form. Please be aware of that too when you make requests.
I learned from Robert Vieira's Professional SQL Server 2000 Programming -- well written and comprehensive. I am pretty sure the 2005 version is very similar, just updated. Despite the 'professional' label, I found it a great intro (I had practically no database experience at the time).
Also I second Erikk's comment. Download SQL Express and PLAY!