How to Connect to Oracle11g Database?

To connect to an Oracle 11g database, you will need to use a client application that supports connecting to Oracle databases, such as SQL*Plus, SQL Developer, or Oracle SQL Developer Data Modeler.

First, ensure that you have the necessary credentials to connect to the database (username, password, and database host).

Next, open your preferred client application and enter the connection details, including the username, password, host, and port number.

If you are using SQL*Plus, you can type the following command to connect to the database:

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sqlplus username/password@hostname:port_number/SID

Replace "username," "password," "hostname," "port_number," and "SID" with your actual connection details.

Once you have entered the connection details, press Enter to establish a connection to the Oracle 11g database.

If the connection is successful, you will be able to run SQL queries and interact with the database through the client application.

What is the default language for Oracle11g database?

The default language for Oracle11g database is American English.

What is the default undo tablespace for Oracle11g database?

The default undo tablespace for an Oracle 11g database is named "UNDOTBS1".

What is the connection timeout for Oracle11g database connection?

The default connection timeout for Oracle11g database connection is 60 seconds. This means that if a connection attempt is not successful within 60 seconds, the connection will time out and an error will be returned.

What is the default timezone for Oracle11g database?

The default timezone for an Oracle11g database is generally set based on the timezone of the server on which the database is installed. It can also be set explicitly by the administrator during the database creation or by altering the database parameters.

How to connect to Oracle11g database using PHP?

To connect to an Oracle11g database using PHP, you can use the following steps:

1. Make sure you have the Oracle Instant Client installed on your server. You can download it from the Oracle website.
2. Install the PHP OCI8 extension. You can enable it by adding the following line to your php.ini file:

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extension=oci8.so

1. Create a connection to the Oracle database using the following code:

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<?php
$host = 'localhost';
$port = '1521';
$dbname = 'ORCL';
$username = 'your_username';
$password = 'your_password';

$conn = oci_connect($username, $password, "(DESCRIPTION=(ADDRESS=(PROTOCOL=TCP)(HOST=$host)(PORT=$port))(CONNECT_DATA=(SID=$dbname)))");

if (!$conn) {
    $e = oci_error();
    trigger_error(htmlentities($e['message'], ENT_QUOTES), E_USER_ERROR);
}

?>

1. You can now execute SQL queries on the Oracle database by using the oci_parse() and oci_execute() functions. Here is an example:

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$query = 'SELECT * FROM employees';
$statement = oci_parse($conn, $query);
oci_execute($statement);

while ($row = oci_fetch_array($statement, OCI_ASSOC+OCI_RETURN_NULLS)) {
    foreach ($row as $item) {
        echo $item . "\n";
    }
}

Make sure to replace the variables like host, port, dbname, username, and password with your actual database information. And also, make sure to handle errors properly in your code.