我正在使用woocommerce,并提供woocommerce。 我想获取没有报价的产品ID。我准备了代码,但没有用:( 我在第二个查询中尝试过:SELECTdistinct(wp_postmeta.meta_value)...,但是它也不起作用。
$draftid = $wpdb->get_col('SELECT wp_posts.ID FROM ' . $wpdb->postmeta . ' join ' . $wpdb->posts . ' ON wp_posts.ID = wp_postmeta.post_id
WHERE wp_posts.post_status="draft" and wp_postmeta.meta_key="_sale_price_dates_to" and wp_postmeta.meta_value != "" and wp_postmeta.meta_value<="' . (time()-1296000) . '"
EXCEPT SELECT wp_postmeta.meta_value FROM ' . $wpdb->postmeta . ' join ' . $wpdb->posts . ' ON wp_posts.ID = wp_postmeta.post_id
WHERE wp_postmeta.meta_key="orig_offer_product_id" and wp_postmeta.meta_value !="" and wp_posts.post_type="woocommerce_offer"'); print_r($draftid);
但分别第一个查询有效,第二个查询也有效。如果我使用“联合”而不是“除外”,它也可以工作。
知道为什么吗?
答案 0 :(得分:0)
不做任何保证就尝试以下操作:
global $wpdb;
$draft_id = $wpdb->get_col("
SELECT p.ID
FROM {$wpdb->prefix}posts as p
JOIN {$wpdb->prefix}postmeta as pm ON p.ID = pm.post_id
WHERE p.post_status = 'draft'
AND pm.meta_key = '_sale_price_dates_to'
AND pm.meta_value ! = ''
AND pm.meta_value <= " . (time()-1296000) . "
AND p.ID NOT IN (
SELECT p2.ID
FROM {$wpdb->prefix}posts as p2
JOIN {$wpdb->prefix}postmeta as pm2 ON p2.ID = pm2.post_id
AND pm2.meta_key = 'orig_offer_product_id'
AND pm2.meta_value ! = ''
AND p2.post_type = 'woocommerce_offer'
)
");
print_r($draft_id);
我希望它能起作用。