Question

我有很多自定义字段 - 价格，重量等............

现在我正在尝试基于此创建自定义搜索，并且我希望按最小值和最小值搜索最大...不知怎的，我无法创建确切的查询.........会感谢别人的帮助...

这是我正在尝试的查询

$where = "";
if ( isset( $_POST['pricemin']) && $_POST['pricemin'] != "" ) {
    $pricemin = $_POST['pricemin'];
    $where .= " and (SELECT post_id from wp_postmeta where  meta_key='list_price' and meta_value > ".$pricemin.$order.") ";
}
if ( isset( $_POST['pricemax']) && $_POST['pricemax'] != "" ) {
    $pricemax = $_POST['pricemax'];
    $where .= " and (SELECT post_id from wp_postmeta where  meta_key='list_price' and meta_value < ".$pricemax.$order.") ";
}

这是最后一行......

"SELECT * from wp_posts where ID IN (select 1 from wp_postmeta ".$where.")"

有关UNION，INTERSECT等的任何建议或最佳方式..........谢谢

其实mysql之间解决了我的一半问题......我可以把它全部写成

if ( isset( $_POST['pricemin'] ) && $_POST['pricemin'] != "" ) {
    $pricemin = $_POST['pricemin'];
    $wherep1= "  (SELECT post_id from wp_postmeta where  meta_key='list_price' and meta_value > ".$pricemin.$order.") ";
}
if ( isset( $_POST['pricemax'] ) && $_POST['pricemax'] != "" ) {
    $pricemax = $_POST['pricemax'];
    $wherep1 = " (SELECT post_id from wp_postmeta where  meta_key='list_price' and meta_value < ".$pricemax.$order.") ";
}
if ( isset($_POST['pricemin'] ) && $_POST['pricemin'] != "" && isset( $_POST['pricemax'] ) && $_POST['pricemax'] != "" ) {
    $pricemin = $_POST['pricemin'];
    $pricemax = $_POST['pricemax'];
    $wherep1 = " (SELECT post_id from wp_postmeta where  meta_key='list_price' and meta_value BETWEEN ".$pricemin." and ".$pricemax ." ".$order.") ";
}

但是我想搜索重量，身高..............

所以，像Intersect这样的东西可以帮助我..但是我看到MYSQL不支持INTERSECT ........所以，问题仍然是如何重写查询

在mysql中的INTERSECT B INTERSECT C INTERSECT D

Answer 1

将您的最终查询修改为：

"SELECT * from wp_posts where ID IN (select post_id from wp_postmeta ".$where.")"

Answer 2

得到答案.....

SELECT * from wp_posts where ID IN ( (SELECT post_id from wp_postmeta where meta_key='list_price' and meta_value BETWEEN 1 and 1229000 ) ) and id in (SELECT post_id from wp_postmeta where meta_key='weight' and meta_value BETWEEN 20 and 200 )

使用Between＆amp;和条款！

Wordpress自定义字段的高级Mysql

2 个答案: