How to create a New database application in APEX

Hi everyone..
Greetings!!!
I am a beginner to Oracle APEX, i want to develop a new database application(upload my own data) and wants to perform validations, LOV's, Regions etc..
Can you guide me to handle this....
Thanks,
suresh

Suresh,
The forum can help ... but maybe "guide" is asking a lot. There are tons of suggestions here (in the forum).
Have you read? https://forums.oracle.com/forums/ann.jspa?annID=1324 It's a good place to start.
There are a wealth of APEX books if you have access to Safari, Books 24 or something like those.
There are on-line courses: See http://www.oracle.com/technetwork/tutorials/index.html
Specifically: http://apex.oracle.com/pls/apex/f?p=44785:24:87555121473::NO::P24_CONTENT_ID,P24_PREV_PAGE:6268,1 is "Building an Application using Oracle Application Express: Part 1"
I'm certain you can find many more by Google'ing.
If you're like me, you need to see (and do) many examples before you launch off into something non-trivial.
Best wishes,
Howard

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    <!-- Access log processes all requests for this virtual host. By
    default, log files are created in the "logs" directory relative to
    $CATALINA_HOME. If you wish, you can specify a different
    directory with the "directory" attribute. Specify either a relative
    (to $CATALINA_HOME) or absolute path to the desired directory.
    -->
    <!--
    <Valve className="org.apache.catalina.valves.AccessLogValve"
    directory="logs" prefix="localhost_access_log." suffix=".txt"
    pattern="common" resolveHosts="false"/>
    -->
    <!-- Logger shared by all Contexts related to this virtual host. By
    default (when using FileLogger), log files are created in the "logs"
    directory relative to $CATALINA_HOME. If you wish, you can specify
    a different directory with the "directory" attribute. Specify either a
    relative (to $CATALINA_HOME) or absolute path to the desired
    directory.-->
    <Logger className="org.apache.catalina.logger.FileLogger"
    directory="logs" prefix="localhost_log." suffix=".txt"
    timestamp="true"/>
    <!-- Define properties for each web application. This is only needed
    if you want to set non-default properties, or have web application
    document roots in places other than the virtual host's appBase
    directory. -->
         <DefaultContext reloadable="true"/>
    <!-- Tomcat Root Context -->
    <Context path="" docBase="ROOT" debug="0"/>
    <!-- Tomcat Examples Context -->
    <Context path="/examples" docBase="examples" debug="0"
    reloadable="true" crossContext="true">
    <Logger className="org.apache.catalina.logger.FileLogger"
    prefix="localhost_examples_log." suffix=".txt"
    timestamp="true"/>
    <Ejb name="ejb/EmplRecord" type="Entity"
    home="com.wombat.empl.EmployeeRecordHome"
    remote="com.wombat.empl.EmployeeRecord"/>
    <!-- If you wanted the examples app to be able to edit the
    user database, you would uncomment the following entry.
    Of course, you would want to enable security on the
    application as well, so this is not done by default!
    The database object could be accessed like this:
    Context initCtx = new InitialContext();
    Context envCtx = (Context) initCtx.lookup("java:comp/env");
    UserDatabase database =
    (UserDatabase) envCtx.lookup("userDatabase");
    -->
    <!--
    <ResourceLink name="userDatabase" global="UserDatabase"
    type="org.apache.catalina.UserDatabase"/>
    -->
    <!-- PersistentManager: Uncomment the section below to test Persistent
    Sessions.
    saveOnRestart: If true, all active sessions will be saved
    to the Store when Catalina is shutdown, regardless of
    other settings. All Sessions found in the Store will be
    loaded on startup. Sessions past their expiration are
    ignored in both cases.
    maxActiveSessions: If 0 or greater, having too many active
    sessions will result in some being swapped out. minIdleSwap
    limits this. -1 or 0 means unlimited sessions are allowed.
    If it is not possible to swap sessions new sessions will
    be rejected.
    This avoids thrashing when the site is highly active.
    minIdleSwap: Sessions must be idle for at least this long
    (in seconds) before they will be swapped out due to
    activity.
    0 means sessions will almost always be swapped out after
    use - this will be noticeably slow for your users.
    maxIdleSwap: Sessions will be swapped out if idle for this
    long (in seconds). If minIdleSwap is higher, then it will
    override this. This isn't exact: it is checked periodically.
    -1 means sessions won't be swapped out for this reason,
    although they may be swapped out for maxActiveSessions.
    If set to >= 0, guarantees that all sessions found in the
    Store will be loaded on startup.
    maxIdleBackup: Sessions will be backed up (saved to the Store,
    but left in active memory) if idle for this long (in seconds),
    and all sessions found in the Store will be loaded on startup.
    If set to -1 sessions will not be backed up, 0 means they
    should be backed up shortly after being used.
    To clear sessions from the Store, set maxActiveSessions, maxIdleSwap,
    and minIdleBackup all to -1, saveOnRestart to false, then restart
    Catalina.
    -->
    <!--
    <Manager className="org.apache.catalina.session.PersistentManager"
    debug="0"
    saveOnRestart="true"
    maxActiveSessions="-1"
    minIdleSwap="-1"
    maxIdleSwap="-1"
    maxIdleBackup="-1">
    <Store className="org.apache.catalina.session.FileStore"/>
    </Manager>
    -->
    <Environment name="maxExemptions" type="java.lang.Integer"
    value="15"/>
    <Parameter name="context.param.name" value="context.param.value"
    override="false"/>
    <Resource name="jdbc/EmployeeAppDb" auth="SERVLET"
    type="javax.sql.DataSource"/>
    <ResourceParams name="jdbc/EmployeeAppDb">
    <parameter><name>username</name><value>sa</value></parameter>
    <parameter><name>password</name><value></value></parameter>
    <parameter><name>driverClassName</name>
    <value>org.hsql.jdbcDriver</value></parameter>
    <parameter><name>url</name>
    <value>jdbc:HypersonicSQL:database</value></parameter>
    </ResourceParams>
    <Resource name="mail/Session" auth="Container"
    type="javax.mail.Session"/>
    <ResourceParams name="mail/Session">
    <parameter>
    <name>mail.smtp.host</name>
    <value>localhost</value>
    </parameter>
    </ResourceParams>
    <ResourceLink name="linkToGlobalResource"
    global="simpleValue"
    type="java.lang.Integer"/>
    </Context>
    </Host>
    </Engine>
    </Service>
    </Server>

    To use servlets u have indeed to update your web.xml...Well I'm not sure this is relevant to your case anyway.
    You have to add a <servlet> element to this file.
    Something like this:
    <servlet>
    <servlet-name>blabla</servlet-name>
    <servlet-class>blablapackage.Blablaclass</servlet-class>
    <init-param>...</init-param>
    </servlet>
    Now this may not solve your problem. Make sure you refer to your servlets using their full qualified names.btw, just to be sure, what is your definition of "servlet"? (i mean: any java class or only javax.servlet.Servlet)

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