Question

php片段：

mysqli_select_db($con,"dbtest");
$sql="SELECT * FROM w3school";
$result = mysqli_query($con,$sql);


echo "<ul id='myUL'>";
while($w3school = mysqli_fetch_array($result)) {
    echo "<li id='".$w3school['id']."'>" . $w3school['LastName'] . "</li>";
}
echo "<ul>";

SCREEN OUTPUT看起来像这样：

id = 5;
id = 4;
id = 3;
id = 1;
id = 2;

我不明白为什么它不是1,2,3,4 ......

有什么建议吗？（任何规格信息只是让我知道）

Answer 1

您的查询需要order by。

SELECT * FROM w3school order by id

Answer 2

您需要按照您想要按ID订购的方式使用订单 - ＆gt; 1,2,3,4 ...

SELECT * FROM w3school order by id asc;

或简单

 SELECT * FROM w3school order by id; // no need to add asc, default asc

如果你想要6,5,4,3,2,1那么请使用desc之类的命令

SELECT * FROM w3school order by id desc;

您可以像这样使用多个订单

SELECT * FROM t1 ORDER BY key_part1 DESC, key_part2 ASC;

更多信息

https://dev.mysql.com/doc/refman/5.7/en/order-by-optimization.html

显示mysql-table - 显示错误的顺序

2 个答案: