在phpmyadmin SELECT WHERE 1中显示行0 - 0（总计1次，查询耗时0.0008秒。）

Question

I have inserted a row in a phpmyadmin table but when i run any of following commands it returns:

Showing rows 0 - 0 (1 total, Query took 0.0008 seconds.)

SELECT * FROM library_info WHERE 1

SELECT * FROM library_info

SELECT * FROM library_info WHERE 1

SELECT * FROM library_info

HOW THE DATA IS STORED IN THE TABLE

I need to use the same in my login page of php code for php page is

<?php
require('connect.inc.php');
// User is not logged in.
session_start();
if (isset($_POST['cmdlogin'])) {
    $u     = strip_tags($_POST['username']);
    $p     = strip_tags($_POST['password']);
    $query = "SELECT * FROM user_details WHERE USERNAME = '$u' AND PASSWORD = '$p'";
    echo $query;

    $result = mysql_query($query, $conn);
    if ($result) {
        echo "Valid";
    } else {
        echo "Invalid";
    } 
} else {
    echo "2";
    include 'index.php';
}
?>

Result: SELECT * FROM user_details WHERE USERNAME = 'Admin' and PASSWORD = 'JainLibrary' Invalid

Answer 1

The row-counter is zero-based, so you get the 0-th row that is exactly the one you inserted.