Question

我正在使用wordpress。网站上有很多产品。页面中有一个价格排序过滤器（从低到高，从高到低）。

问题是我的产品价格不是数字而只是文本（即P.O.R.）。在两种情况下，我都要求在结果结束时使用这些产品。

我的代码需要使用sql查询而不是get_posts（）等...所以我构建了2个查询：在第一个查询中我得到的产品不是文本，在第二个查询中我是获取带有文本的产品（在第二个查询中执行，以便它们将在最后）。这是我的代码：

$sql1 = "SELECT * FROM wp_posts AS table1 INNER JOIN (SELECT * FROM wp_postmeta WHERE 
meta_key = 'product_price' AND meta_value != 'P.O.R.' order by (meta_value + 0) ASC) AS 
table2 ON table1.ID = table2.post_id WHERE table1.ID IN ($currentActiveProductIds) AND
table1.post_type = 'product-items' AND table1.post_status = 'publish'";

$sql2 = "SELECT * FROM wp_posts AS table1 INNER JOIN (SELECT * FROM wp_postmeta WHERE 
meta_key = 'product_price' AND meta_value = 'P.O.R.') AS table2 ON
table1.ID = table2.post_id WHERE table1.ID IN ($currentActiveProductIds) 
AND table1.post_type = 'product-items' AND table1.post_status = 'publish'";

$sql = $sql1." UNION ".$sql2;

问题是订购工作不正常。这是因为第二次查询，因为当我只留下第一个查询时，它在两种情况下都被正确排序。

Answer 1

使用连接时，无法在内部查询中使用order by .. 我做了一些改变，它应该工作..

$sql1 = "SELECT * FROM wp_posts AS table1 INNER JOIN (SELECT * FROM wp_postmeta WHERE 
meta_key = 'product_price' AND meta_value != 'P.O.R.') AS 
table2 ON table1.ID = table2.post_id WHERE table1.ID IN ($currentActiveProductIds) AND
table1.post_type = 'product-items' AND table1.post_status = 'publish'";

$sql2 = "SELECT * FROM wp_posts AS table1 INNER JOIN (SELECT * FROM wp_postmeta WHERE 
meta_key = 'product_price' AND meta_value = 'P.O.R.') AS table2 ON
table1.ID = table2.post_id WHERE table1.ID IN ($currentActiveProductIds) 
AND table1.post_type = 'product-items' AND table1.post_status = 'publish'";

$sql = $sql1." UNION ".$sql2;

使用IN（）的2个SQL查询的UNION - ORDER BY无法正常工作

1 个答案: