Question

我现有的查询工作完美无缺。但是，我有一个新字段，用于确定显示这些结果的区域顺序。

例如，如果用户正在浏览网站1（ID 123），那么所有记录对于区域123和234和543必须显示，但首先记录区域ID 123，然后根据我现有的顺序记录234和543。变量的区域始终为$AreaID。

请记住我没有按照该区域过滤记录，我只想将该区域的记录全部放在cont_id ASC订单

中

我无法在任何地方找到一个例子，甚至可以给我一个可以进行实验的方向。我想我必须以某种方式单独选择它们？

$sql = "select * 
    from 202_articles 
    where cont_date_published <= CURDATE() 
    and cont_time_published < CURTIME() 
    and cont_category_id = $TypeID 
    ORDER by cont_id ASC 
    LIMIT 25";

任何帮助表示感谢。

Answer 1

假设您有一个名为AreaID的列，请先使用案例按该条件排序：

$sql = "select * 
from 202_articles 
where cont_date_published <= CURDATE() 
and cont_time_published < CURTIME() 
and cont_category_id = $TypeID 
ORDER by
CASE WHEN AreaID = $AreaID THEN 0 ELSE 1 END,
AreaID,
cont_id ASC 
LIMIT 25";

Answer 2

$sql = "select * 
from 202_articles 
where cont_date_published <= CURDATE() 
and cont_time_published < CURTIME() 
and cont_category_id = $TypeID 
ORDER by cont_id ASC 
LIMIT 25";

如果您知道该区域，则可以使用以下查询而不是上述查询。

$sql = "select * 
from 202_articles 
where cont_date_published <= CURDATE() 
and cont_time_published < CURTIME() 
and cont_category_id = $TypeID 
ORDER by cont_id='$userarea' ASC, cont_id ASC 
LIMIT 25";

Answer 3

您可以使用简单的UNION JOIN执行此操作，以选择具有特定cont_id的所有内容，然后按cont_id ASC

选择所有其他排序

SELECT
    *
FROM
    202_articles
WHERE
    cont_date_published <= CURDATE()
AND cont_time_published < CURTIME()
AND cont_category_id = $TypeID
AND cont_id = $AreaID
UNION
    SELECT
        *
    FROM
        202_articles
    WHERE
        cont_date_published <= CURDATE()
    AND cont_time_published < CURTIME()
    AND cont_category_id = $TypeID
    ORDER BY
        cont_id ASC
    LIMIT 25

POC：http://sqlfiddle.com/#!9/3ae07/1

排序而不是过滤

3 个答案: