error in your SQL syntax; check the manual that corresponds to your MySQL server

This error message indicates a problem with the SQL syntax used in the query. It suggests checking the MySQL manual for the correct syntax corresponding to your server version. You must identify the specific syntax mistake and correct it to resolve the error.

Here's an example demonstrating how to catch and display a SQL syntax error in PHP:

Example of handling SQL syntax errors in PHP

<?php

// Connect to the MySQL database server
$mysql_host = "localhost";
$mysql_username = "root";
$mysql_password = "secret";
$mysql_database = "test_db";

$conn = mysqli_connect($mysql_host, $mysql_username, $mysql_password, $mysql_database);

// Check if the connection was successful
if (!$conn) {
    die("Connection failed: " . mysqli_connect_error());
}

// Define a query with an intentional syntax error (trailing AND)
$sql = "SELECT * FROM users WHERE id = 1 AND";

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

// Check if the query failed
if (!$result) {
    // Get the error message
    $error = mysqli_error($conn);

    // Print the error message
    echo "Error in your SQL syntax: " . $error;
} else {
    // Fetch the result data
    while ($row = mysqli_fetch_assoc($result)) {
        print_r($row);
    }
}

// Close the database connection
mysqli_close($conn);

?>

Common causes and troubleshooting steps:

• Missing or mismatched quotes: Ensure all string values are properly enclosed in single or double quotes.
• Misspelled keywords: Verify that SQL keywords (SELECT, FROM, WHERE, AND, OR, etc.) are spelled correctly.
• Incorrect clause order: SQL clauses must follow a specific order (SELECT → FROM → WHERE → GROUP BY → ORDER BY → LIMIT).
• Trailing punctuation: Avoid leaving operators like AND or OR at the end of a WHERE clause without a following condition.
• Resolution: Copy the exact error message from $error, locate the highlighted position in your query, and compare it against the official MySQL documentation for your server version.