Question

How do i identify multiple sqlite databases in my app at run time. I am making a quiz app for iphone in which i need 5-6 sqlite databases, one for each category(subject) of quiz. Help anyone

Answer 1

Since this would be too long to post as a comment and it does somehow address your question,
I would suggest again to use a different structure for your application because having multiple databases is not practical for such a simple thing as a quiz.

You can find some database structure examples here Storing a multiple choice quiz in a database – deciding the schema or here Database Design For Developing 'Quiz' Web Application using PHP and MySQL

Assuming you have simple quizzes with different categories, a possible alternative would be to store your categories in a Categories table.

* Category
    - category_id (integer)
    - category_name (string/text)

Where the id would be unique for each one. You could have, for example, the category sports with the id 1 and the category history with the id 2.

The questions could be stored in another table, named Questions

* Questions
    - question_id (integer)
    - question_category (integer)
    - question_text (string/text)
    - question_correct_answer_id (integer)

You can have question 1: For what team played John Doe?. In the question_category field you put 1, since 1 is the id of the Sports category. In the question_correct_answer_id you will store the id of the correct answer (not the answer itself, just the id)

Last but not least, an Answers table.

* Answers
    - answer_id (integer)
    - question_id (integer)
    - answer_text (string/text)

Here answer_id is the id of the answer, you can store it in the Questions table if it’s the correct one, and a question_id to identify the question.

Then you can do something like:

`SELECT * FROM Questions WHERE 'question_category' = 1` 

and get all the Sports questions.
And for each question, you can do

SELECT * FROM Answers WHERE 'question_id' = 'your question's id'

Be careful, my examples aren’t necessary the best solution, it’s just a basic example that uses just a single database, but with multiple tables instead of multiple databases.

My advice to you would be to consider this alternative and if you think it’s worth it, read a little about databases and design a better one.

Good luck!