Question

如何在MySQL中连接WordPress wp_posts和wp_postmeta？提前谢谢..

Answer 1

post_id是wp_postmeta表中的索引。

Answer 2

试试这个，基于上面提到的链接，我能够创建此模式，以根据3个meta_values和1个自定义分类法搜索自定义posts_types。

所以我的结构是：每个自定义帖子（人才）都有3个自定义字段（城市，国家，性别）。每个自定义帖子都属于自定义分类标准＆＃34;语言＆＃34;某些类别，如英语，西班牙语，俄语等。

所以下面的查询正在寻找一位在加拿大，多伦多可以说法语的女性。

 <?php
    global $wpdb; // define global keyword

    $query = "SELECT * FROM wp_posts
    LEFT JOIN wp_postmeta v1 ON (wp_posts.ID = v1.post_id)
    LEFT JOIN wp_postmeta v2 ON (wp_posts.ID = v2.post_id)
    LEFT JOIN wp_postmeta v3 ON (wp_posts.ID = v3.post_id)
    LEFT JOIN wp_term_relationships ON (wp_posts.ID = wp_term_relationships.object_id)
    LEFT JOIN wp_term_taxonomy ON (wp_term_relationships.term_taxonomy_id = wp_term_taxonomy.term_taxonomy_id)
    LEFT JOIN wp_terms ON (wp_term_taxonomy.term_id = wp_terms.term_id) 
    WHERE
    wp_terms.name = 'French' AND wp_term_taxonomy.taxonomy = 'Languages' AND wp_posts.post_status = 'publish' AND wp_posts.post_type = 'talents' 
    AND v1.meta_value = 'Toronto'
    AND v2.meta_value = 'Canada'
    AND v3.meta_value = 'female' 
    ORDER BY wp_posts.post_date DESC"; // Make query

    $result = $wpdb->get_results($query); //if Pass the variable in get_results function than get results

    print_r($result);

    ?>

如何在mysql中连接wp_posts和wp_postmeta？

2 个答案: