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    <blockquote> <p>How to make the database accesible by all, since the application will be installed on computers that I mentioned above, do I have to install it (the database) on these computers and this modification, the constraints of consistency and integrity of the database will be violated.</p> </blockquote> <p>Your question suggests that you will need one database on one computer. Let's call it a DB computer. I'd suggest this be a server, that no one from regular staff, such as secretary, manager, etc... can access. </p> <p>Having one central database will eliminate your worries about integrity violation.</p> <p>Now, you have two options. You can make a web application that your users will use to interact with your system. This is a more modern approach, since you'll have a 3 tier system:</p> <ol> <li>users will access your application via a browser</li> <li>the web application itself is stored on an application server, and it is accessing the database</li> <li>the database is the backend part</li> </ol> <p>The second option is making a desktop application and deploying it to everybody's computer that will use it; and afterwards making it connect to the database for interacting with it.</p> <p>The first option is easier when you want to expose your application to a large number of users (and to the web), but know what you're doing when doing stuff like this, since you have to take security very seriously.</p> <p>If you go the first route, you will need a few things:</p> <p>First, a database. Use what you can, but if you need free and high quality databases, use <a href="http://www.postgresql.org/" rel="nofollow">PostgreSQL</a> or <a href="http://www.mysql.com/" rel="nofollow">MySQL</a>.</p> <p>Second, an application server. I suggest using <a href="http://tomcat.apache.org/" rel="nofollow">Tomcat</a> or <a href="http://glassfish.java.net/" rel="nofollow">GlassFish</a>.</p> <p>Now, you need to develop your application using <a href="http://download.oracle.com/javaee/" rel="nofollow">JavaEE</a>. There is a wealth of information about this, so I hope this will help you in the beginning and point you in the right direction.</p> <p>Note that Tomcat doesn't support Java EE fully, but a subset of it. And this subset is surely more than enough for what you need to accomplish.</p>
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    1. COThanks man! I'm realy very grateful!
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