Accessing another database from HTMLDB

All is there a way to do selects on another database from within an HTMLDB application.

We have several applications on our intranet, all requiring login & password. I was unable to hit the needed tables directly outside the application as I'm not a DBA and they've never given me access to the schema names. So while trying to connect to those same tables as I do with Crystal Reports, I just went to the network drive where the TNSNAMES file is located, hunted for the IP of the server I was looking for, used that SID and did the following:
Database Link Name - (whatever I want)
Connect to Schema - (used my username that I use with crystal)
Password - (same password used in crystal)
Remote Hostname or IP - used stolen IP found in TNSNAMES
Remote Host Port - used port found in TNSNAMES
SID or Service Name - same as in crytal but also found in tnsnames.
After that I had no problem hitting the tables I wanted as my username and login gets me the access I need.
I can't tell for sure why I don't need the actual schema name and why my username works instead. I'm just glad it does as I can now use the necessary tables to do MY authentication scheme without relying having to ask to get access to the scheme used by the department. They wouldn't give it to me anyway:)
Hope that helped, I know it didn't explain why it works tho.
Not sure what you mean by the SQL query... that is done for you in HTML DB in the connect string created by the link.
If you mean how do you hit the link you use it prefaced by the at sign "@" as in gimme what I want from the database @(the link name you made)

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Trying to access 10gr2 database from sqlplus utility but it connects to 11g

Hi All,
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Hi Rocky,
I got the resolution.
I made a mistake by creating an oracle instance/service(e.g. fsdmo) when Oracle_home was pointing to 11gR2 Directory.so that service was refering to 11gr2 oracle home.
hence when I was setting oracle_sid(fsdmo) and trying to access database instance from 11g sqlplus utility ,it was directing to 11g and not 10g since oracle service was pointing to 11g.
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thank you so much for responding.
hope I am clear with my reply.
Best Regards,
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WHY can't I access my database from an applet???????????

The security code won't let my applet access its own database (from its own server)..
I'm using getDocumentBase()
to try and tell it that it is my own damn file..
I keep getting :
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The simple answer to your question is: Because of security concerns.
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I've been trying to create a database link from a MySQL database to Oracle using the Oracle dg4odbc gateway. I downloaded and installed DataDirect's ODBC package which includes mysql ODBC library (ddmysql24.so) and a generic ODBC libary (libodbc.so). After creating the DSN in odbc.ini, I tested it and it can connect to the mysql database. Then I created the init{SID}.ora file in hs/admin directory, added dg4odbc lines in the listener.ora, and added lines in tnsnames.ora. Then I tnspinged the new SID with success. Finally, I created the database link. However, when I tried to access the database link using the commands "select * from mdl_user@moodle;", I got the ORA-28500 error like the following:
ERROR at line 1:
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- execute:
DECLARE
ret integer;
c integer;
BEGIN
c := DBMS_HS_PASSTHROUGH.OPEN_CURSOR@moodle;
DBMS_HS_PASSTHROUGH.PARSE@moodle(c, 'SET SESSION SQL_MODE=''ANSI_QUOTES'';');
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dbms_output.put_line(ret ||' passthrough output');
DBMS_HS_PASSTHROUGH.CLOSE_CURSOR@moodle(c);
END;
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hi,
see on oss note Question 4
Note 555223 - FAQ: Microsoft SQL Server
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Accessing another variable from another application

I was wonder how I can access another variable form another application?
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hi
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Hello,
I don't have experience with this, but you might look into the following:
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Best Regards,
JLS
Best,
JLS
Sixclear

Access oracle database from different classes in desktop / standalone app.

I am a bit confused as to what way to go. I am building a desktop application that needs to access an oracle database. I have done this in the past using code similar to the following:
        try {             DriverManager.registerDriver(new oracle.jdbc.driver.OracleDriver());             Connection conn = DriverManager.getConnection(                     "jdbc:oracle:thin:@111.111.111.111:oracledb",                     "username", "password" );             // Create a Statement             Statement stmt = conn.createStatement();             ResultSet rs = stmt.executeQuery(                     "select ... from ...");             while (rs.next()) {                 ReportNumberCombo.addItem(rs.getString(1));             } // end of rs while             conn.close();         } // end of try         catch( Exception e ) {             e.printStackTrace();         }
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I have tried exactly that and am getting an error which let me to believe it couldn't be done that way. Here is my code and error message:
public class readPropsFile {
    String getURL() throws IOException {
        // default values for properties file
        String Family = "Family:jdbc" + ":oracle:" + "thin:@";
        String Server = "Server:111.111.111.111";
        String Port = "Port:1521";
        String Host = "Host:oradb";
        String Username = "Username:username";
        String Password = "Password:password";
        try {
            new BufferedReader(new FileReader("C:\\data\\Properties.txt"));
        } catch (FileNotFoundException filenotfound) {
            System.out.println("Error: " + filenotfound.getMessage());
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            System.out.println("The file DOES NOT exist, now creating...");
            FileWriter fileObject = null;
            fileObject = new FileWriter("c:\\data\\Properties.txt");
            BufferedWriter out = new BufferedWriter(fileObject);
            // writes to output as simple text.
            out.write(Family);
            out.newLine();
            out.write(Server);
            out.newLine();
            out.write(Port);
            out.newLine();
            out.write(Host);
            out.newLine();
            out.write(Username);
            out.newLine();
            out.write(Password);
            out.newLine();
            out.close();
        // displays to console if file exists
        System.out.println("The file exists, or was created sucessfully");
//      creates the properties object, assigns text file.
        Properties props = new Properties();
        FileInputStream in = new FileInputStream("c:\\data\\Properties.txt");
        props.load(in);
        Family = props.getProperty("Family");
        Server = props.getProperty("Server");
        Port = props.getProperty("Port");
        Host = props.getProperty("Host");
        Username = props.getProperty("Username");
        Password = props.getProperty("Password");
//      prints properties to a file for troubleshooting
        PrintStream s = new PrintStream("c:\\data\\list.txt");
        props.list(s);
        in.close();
        String URL = "\"" + Family + Server + ":" + Port + ":" + Host + "\"" +
                "," + "\"" + Username + "\"" + "," + "\"" + Password + "\"";
        System.out.println("This is the URL:" + URL);
        return URL;
}And here is where I try to call the method:
public class connWithProps1 {
    public static void main(String[] args) {
        readPropsFile callProps = new readPropsFile();
        try {
            callProps.getURL();
            String url = callProps.getURL(); // not needed
            System.out.println("The URL (in connWithProps1) is: " + csoProps.getURL());
            DriverManager.registerDriver(new oracle.jdbc.driver.OracleDriver());
            Connection conn = DriverManager.getConnection(url);
            // Create a Statement
            Statement stmt = conn.createStatement();
            ResultSet rs = stmt.executeQuery("select .... WHERE ....'");
            while (rs.next()) {
                System.out.println(rs.getString(1));
            } // end of rs while
            conn.close();
        } catch (SQLException sqle) {
            Logger.getLogger(connWithProps1.class.getName()).log(Level.SEVERE, null, sqle);
        } catch (IOException ioe) {
            Logger.getLogger(connWithProps1.class.getName()).log(Level.SEVERE, null, ioe);
}The error I get is:
SEVERE: null
java.sql.SQLException: Listener refused the connection with the following error:
ORA-12505, TNS:listener does not currently know of SID given in connect descriptor
The Connection descriptor used by the client was:
111.111.111.111:1521:oradb","username","password"
        at oracle.jdbc.driver.SQLStateMapping.newSQLException(SQLStateMapping.java:70)
        at oracle.jdbc.driver.DatabaseError.newSQLException(DatabaseError.java:112)
        at oracle.jdbc.driver.DatabaseError.throwSqlException(DatabaseError.java:173)
        at oracle.jdbc.driver.DatabaseError.throwSqlException(DatabaseError.java:460)
        at oracle.jdbc.driver.T4CConnection.logon(T4CConnection.java:411)
        at oracle.jdbc.driver.PhysicalConnection.<init>(PhysicalConnection.java:490)
        at oracle.jdbc.driver.T4CConnection.<init>(T4CConnection.java:202)
        at oracle.jdbc.driver.T4CDriverExtension.getConnection(T4CDriverExtension.java:33)
        at oracle.jdbc.driver.OracleDriver.connect(OracleDriver.java:474)
{code}
Although the URL prints out correctly and when I tried plugging in the URL manually, it works just fine. One other thing I noticed was the line "The file exists, or was created sucessfully" is output 3 times.
I will go back and change my code to properly close the resultset, thanks for catching that. Id rather use what I have instead of JNDI unless it's nesessary.
Edited by: shadow_coder on Jun 19, 2009 2:16 PM

Accessing another database from HTMLDB

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