There are many sets of instructions on the Internet for changing the Oracle Database XE default port, including one in Oracle forums. Enter the username. For the purpose of our tutorial, enter system the default database administrator account and password that you used during database installation. The new connection will appear under the Databases node in the Services window. You can expand it and start browsing the database object's structure.
Change the display name for the connection node: choose Properties from the node's popup menu and click the ellipsis button for the Display Name property. Although the steps above demonstrate the case of connecting to a local database instance, the steps for connecting to a remote database are the same.
The only difference is that instead of specifying localhost as the hostname, enter the IP address or hostname of the remote machine where Oracle Database is installed.
A common way of interacting with databases is running SQL commands in an SQL editor or by using database management interfaces. For example, Oracle Database XE has a browser-based interface through which you can administer the database, manage database objects, and manipulate data.
Although you can perform most of the database-related tasks through the Oracle Database management interface, in this tutorial we demonstrate how you can make use of the SQL Editor in the NetBeans IDE to perform some of these tasks. The following exercises demonstrate how to create a new user, quickly recreate a table, and copy the table data. Let's create a new database user account to manipulate tables and data in the database.
To create a new user, you must be logged in under a database administrator account, in our case, the default system account created during database installation. This command creates a new user jim with the password mypassword. Key Features: - Direct Connection.
Database applications based on our solution get an opportunity to establish connection to Oracle by means of native Oracle client software and in Direct Mode.
The failure events map directly to the events defined in the OCI programming interface. The list of possible events is:. Use this option when you migrate any third party ODBC application to Oracle Database and you want to use implicit results functionality as supported by the previous vendor. Data loss is possible when the Driver Manager is converting from Unicode to the local code page.
An ODBC application developer need not explicitly call entry points with the suffix. String arguments are converted from Unicode to the local code page. The text of the SQL statement parameter is converted from Unicode to the local code page. Convert return parameters that are character data from the local code page to Unicode. In this case, the Oracle ODBC Driver uses the knowledge it has about the data type of the column as defined in the database to determine how to best default to fetching the column through OCI.
The driver could default to receiving the column as Unicode, however, this may result in as many as two unnecessary conversions.
The default encoding of the Oracle client is used when fetching data. The following example retrieves the employee names and the job titles from the EMP table. This example shows how to update data. This example may be the most complicated case to update and retrieve data for long data, like CLOB , in Oracle.
This section describes some general programming tips to improve the performance of an ODBC application. Enable connection pooling if the application will frequently connect and disconnect from a data source. Reusing pooled connections is extremely efficient compared to reestablishing a connection. Minimize the number of times a statement must be prepared.
Where possible, use bind parameters to make a statement reusable for different parameter values. Preparing a statement once and executing it several times is much more efficient than preparing the statement for every SQLExecute. This topic discusses performance implications of the following ODBC data source configuration options:. This option enables the support of returning result sets for example, RefCursor from procedure calls.
The default is enabling the returning of result sets. The ODBC Driver must query the database server to determine the set of parameters for a procedure and their data types to determine if there are any RefCursor parameters. This query incurs an additional network round trip the first time any procedure is prepared and executed.
The application can reopen the cursor by executing the statement again without doing a SQLPrepare again. A typical scenario for this is an application that is idle for a while but reuses the same SQL statement.
While the application is idle, it might free up associated server resources. The cursor and associated resources remain open on the database server. Enabling this option causes the associated cursor to be closed on the database server. However, this results in the parse context of the SQL statement being lost. Enabling this option severely impacts performance of applications that prepare a statement once and execute it repeatedly.
If an application is single-threaded, this option can be disabled. By default, the ODBC Driver ensures that access to all internal structures environment, connection, statement are thread-safe. Single-threaded applications can eliminate some of the thread safety overhead by disabling this option. Disabling this option typically shows a minor performance improvement. This value determines how many rows of data at a time the ODBC Driver prefetches from an Oracle database to the client's cache, regardless of the number of rows the application program requests in a single query, thus improving performance.
Setting this too high can worsen response time or consume large amounts of memory. The default is 64, bytes. Choose a value that works best for your application. For example:. To prevent incorrect results as might happen if the parameter value had nonzero fractional seconds , the optimizer applies the conversion to the HIREDATE column resulting in the following statement:.
Unfortunately, this has the effect of disabling the use of the index on the HIREDATE column and instead the server performs a sequential scan of the table. If the table has many rows, this can take a long time. This allows the query optimizer to use any index on the DATE columns.
Search for:. A standard set of error codes. A standard way to connect to and log in to a data source. A standard representation for data types. Related Topics New parameters in the odbc. See Table for more information. Statement Caching Added support for OCI statement caching feature that provides and manages a cache of statements for each session.
Key Features: - Direct Connection. Database applications based on our solution get an opportunity to establish connection to Oracle by means of native Oracle client software and in Direct Mode.
That improves performance of your applications, quality, reliability and especially the deployment process, since there is no need to supply additional client software together with your application. ODBC driver for Oracle doesn't limit your choice of the development platform and environment.
The driver installations are available for various operational systems and platforms. Note that support for x64 versions of Oracle Clients is available for bit Windows. All our products are designed to help you write high-performance, lightweight data access layers, therefore they use advanced data access algorithms and techniques of optimization.
Full Specifications. What's new in version 3. Release July 8, Date Added July 8, Version 3.
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