How can the order of SQL queries in a PHP script affect the display of data in a web application?

The order of SQL queries in a PHP script can affect the display of data in a web application if the queries are dependent on each other. For example, if a query to retrieve data from a database table is executed after a query that updates the same data, the displayed data may not reflect the changes made. To solve this issue, ensure that queries are executed in the correct order to reflect the most up-to-date data. 

// Example of executing SQL queries in the correct order
// Connect to the database
$conn = new mysqli($servername, $username, $password, $dbname);

// Update data in the database
$update_query = "UPDATE table_name SET column_name = 'new_value' WHERE condition";
$conn->query($update_query);

// Retrieve updated data from the database
$select_query = "SELECT * FROM table_name WHERE condition";
$result = $conn->query($select_query);

// Display the data
if ($result->num_rows > 0) {
    while($row = $result->fetch_assoc()) {
        echo "Column: " . $row["column_name"] . "<br>";
    }
} else {
    echo "0 results";
}

// Close the database connection
$conn->close();

Keywords

SQL queries PHP script data display web application query order

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