How can the error message "Unknown column 'Kd.Nr' in 'where clause'" be resolved when executing a SQL query in PHP?

The error message "Unknown column 'Kd.Nr' in 'where clause'" indicates that the column 'Nr' does not exist in the table 'Kd'. To resolve this issue, you need to check the column name for typos or verify if the column actually exists in the table. Make sure to use the correct column name in your SQL query to avoid this error. 

<?php
// Assuming $conn is your database connection
$sql = "SELECT * FROM Kd WHERE Nr = 'some_value'";
$result = $conn->query($sql);

if ($result->num_rows > 0) {
    while($row = $result->fetch_assoc()) {
        // Process the data
    }
} else {
    echo "0 results";
}
$conn->close();
?>

Keywords

PHP SQL query error message column name where clause

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