What is the correct syntax to use in a MySQL query when checking for a column that is not NULL in PHP?

When checking for a column that is not NULL in a MySQL query in PHP, you can use the IS NOT NULL condition in the WHERE clause. This condition filters out rows where the specified column is NULL. To implement this in PHP, you can construct your SQL query string with the IS NOT NULL condition included in the WHERE clause. 

// Assuming you have a database connection established

// Define the column you want to check for NULL
$column = 'column_name';

// Construct the SQL query with the IS NOT NULL condition
$sql = "SELECT * FROM table_name WHERE $column IS NOT NULL";

// Execute the query
$result = mysqli_query($connection, $sql);

// Process the result set
if (mysqli_num_rows($result) > 0) {
    while ($row = mysqli_fetch_assoc($result)) {
        // Process each row
    }
} else {
    echo "No rows found where $column is not NULL";
}

Keywords

PHP MySQL query syntax NOT NULL column

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