javascript - 多张幻灯片的 ORDER BY

Question

我有 PHP 查询来显示来自 MYSQL 数据库的结果。我用Swiper jquery 插件在每个幻灯片页面上显示 9 个结果(有 3 张幻灯片)。然后，当有人转到下一页时，它会显示下一个 9。以下是我用来完成此操作的 PHP 查询。

$query_page_1 = mysqli_query( $connection, "SELECT * FROM tblclients  WHERE tblclients.package =  'standard' ORDER BY RAND() LIMIT 0, 9");   
$query_page_2 = mysqli_query( $connection, "SELECT * FROM tblclients  WHERE tblclients.package =  'standard' ORDER BY RAND() LIMIT 9, 9");   
$query_page_3 = mysqli_query( $connection, "SELECT * FROM tblclients  WHERE tblclients.package =  'standard' ORDER BY RAND() LIMIT 18, 9");  

我的问题是，当我使用 ORDER BY RAND() 随机化每个页面上的结果时，它会重复从第 1 页到第 2 页的一些相同结果。

Answer 1

要解决此问题，您需要在整个页面上提供通用种子。例如:

$query_page_1 = mysqli_query( $connection, "SELECT * FROM tblclients  WHERE tblclients.package =  'standard' ORDER BY RAND(42) LIMIT 0, 9");   
$query_page_2 = mysqli_query( $connection, "SELECT * FROM tblclients  WHERE tblclients.package =  'standard' ORDER BY RAND(42) LIMIT 9, 9");   
$query_page_3 = mysqli_query( $connection, "SELECT * FROM tblclients  WHERE tblclients.package =  'standard' ORDER BY RAND(42) LIMIT 18, 9");  

其中 42 是常见的随机种子。