Data Preparation Tips for PHP and Oracle Database

Data preparation skills for PHP and Oracle database

Overview:
When developing using PHP and Oracle database, data preparation is a very important link. This article will introduce some common data preparation techniques, including connecting to the database, creating tables, inserting data, querying data, etc. At the same time, to facilitate understanding, relevant code examples will be provided in the article.

Connecting to the database:
In PHP, you can use the OCI extension to connect to the Oracle database. First, make sure the extension is enabled. Then, use the oci_connect() function provided by the OCI extension to connect. The following is an example of connecting to an Oracle database:

<?php
    $username = 'your_username';
    $password = 'your_password';
    $connection = oci_connect($username, $password, 'localhost/XE');
    if (!$connection) {
        $error = oci_error();
        die('数据库连接失败: ' . $error['message']);
    }
    echo '数据库连接成功';
    oci_close($connection);
?>

Creating tables:
Creating tables is an important step in database preparation. In Oracle database, you can use the CREATE TABLE statement to create a table. Here is an example of creating a simple table:

<?php
    $sql = "CREATE TABLE users (
        id NUMBER PRIMARY KEY,
        name VARCHAR(50),
        email VARCHAR(50)
    )";
    $stmt = oci_parse($connection, $sql);
    oci_execute($stmt);
    echo '表格创建成功';
?>

Inserting data:
Once the table is created, we can insert data. Use the INSERT INTO statement to insert data. The following is an example of inserting data:

<?php
    $sql = "INSERT INTO users (id, name, email) VALUES (1, 'John', 'john@example.com')";
    $stmt = oci_parse($connection, $sql);
    oci_execute($stmt);
    echo '数据插入成功';
?>

Querying data:
Querying data is one of the common operations. In the Oracle database, you can use the SELECT statement to query data. The following is an example of querying data:

<?php
    $sql = "SELECT * FROM users";
    $stmt = oci_parse($connection, $sql);
    oci_execute($stmt);
    while ($row = oci_fetch_array($stmt, OCI_ASSOC+OCI_RETURN_NULLS)) {
        echo 'ID: ' . $row['ID'] . ', Name: ' . $row['NAME'] . ', Email: ' . $row['EMAIL'];
        echo '<br>';
    }
?>

Updating data:
In addition to inserting and querying data, we can also update data. Use the UPDATE statement to update data. The following is an example of updating data:

<?php
    $sql = "UPDATE users SET email = 'new_email@example.com' WHERE id = 1";
    $stmt = oci_parse($connection, $sql);
    oci_execute($stmt);
    echo '数据更新成功';
?>

Deleting data:
Finally, we can use the DELETE statement to delete data. The following is an example of deleting data:

<?php
    $sql = "DELETE FROM users WHERE id = 1";
    $stmt = oci_parse($connection, $sql);
    oci_execute($stmt);
    echo '数据删除成功';
?>

Notes:
There are some things to pay attention to when performing database operations. First, ensure the security of input data to avoid SQL injection attacks. Secondly, close the database connection in time to avoid resource occupation. Finally, use transactions appropriately to ensure data integrity and consistency.

Conclusion:
When developing using PHP and Oracle database, it is very important to prepare the data properly. By connecting to the database, creating tables, inserting data, querying data and other operations, we can make full use of the advantages of PHP and Oracle to quickly develop efficient and stable applications. Hopefully the sample code in this article will help readers better understand and apply these techniques.

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