PHP仅获取所有数据1否

Question

我想获取所有用户，但不获取此用户（id = 12）怎么做？

$MyID = '12';
$sql_query = mysqli_query($Conn, "SELECT * FROM users WHERE country='$MyCountry'");
while ($fetch_data = mysqli_fetch_array($sql_query)) {
    $firstname = $fetch_data['firstname'];
    echo $firstname;
}

Answer 1

好吧，这是最简单的形式：

$sql_query = mysqli_query($Conn, "SELECT * FROM users WHERE country='$MyCountry' and userid <> $MyID");

但这是不可取的，因为您的价值观没有得到正确的转义。 最好使用准备好的语句或mysqli_real_escape_string

$stmt = $mysqli->prepare("SELECT * FROM users WHERE country = ? and userId <> ?")
$stmt->bind_param("sd",$MyCountry, $MyId);
$stmt->execute();

Answer 2

select * from user WHERE  ID!=$mycountry;

Answer 3

这样你就可以轻松做到

假设您的字段是id = 12

然后

SELECT * FROM your_table WHERE id <> 12