我是Wordpress + Woocommerce网站。我需要为其他网站导出.xml。
在post_meta表中有以下字段: _sku woocommerce_xml_disabled woocommerce_xml_EAN
我需要构建此查询:
if '_sku' not empty
copy value from '_sku' to 'woocommerce_xml_EAN'
if '_sku' is empty
set 'woocommerce_xml_disabled' value to '1'.
客户使用SKU字段输入EAN代码,某些产品具有相同的EAN。此字段不接受重复,因此存在值看起来像'9001616391101(1)','9001616391101(2)'的情况。如果查询可以在复制后删除那些(1)数字,那将是很好的。 'woocommerce_xml_EAN'可能有重复的EAN。
这将为我节省很多工作。
以下是SQL的一小部分示例:
(181195, 14947, 'cmsms_breadcrumbs', 'default'),
(181196, 14947, 'cmsms_custom_breadcrumbs', 'a:1:{i:0;a:2:{i:0;s:0:"";i:1;s:0:"";}}'),
(181198, 14947, 'woocommerce_xml_disabled', ''),
(181199, 14947, 'woocommerce_xml_alternative_name', ''),
(181200, 14947, 'woocommerce_xml_alternative_desc', ''),
(181201, 14947, 'woocommerce_xml_group', ''),
(181202, 14947, '_woocommerce_gpf_data', 'a:0:{}'),
(181217, 14946, '_thumbnail_id', '9874'),
(181218, 14946, 'total_sales', '0'),
CREATE TABLE IF NOT EXISTS `wp_postmeta` (
`meta_id` bigint(20) unsigned NOT NULL,
`post_id` bigint(20) unsigned NOT NULL DEFAULT '0',
`meta_key` varchar(255) COLLATE utf8mb4_unicode_ci DEFAULT NULL,
`meta_value` longtext COLLATE utf8mb4_unicode_ci
) ENGINE=InnoDB DEFAULT CHARSET=utf8mb4 COLLATE=utf8mb4_unicode_ci AUTO_INCREMENT=185004 ;
INSERT INTO `wp_postmeta` (`meta_id`, `post_id`, `meta_key`, `meta_value`) VALUES
(173877, 14819, '_visibility', 'visible'),
(173878, 14819, '_stock_status', 'instock'),
(173879, 14819, '_downloadable', 'no'),
(173880, 14819, '_virtual', 'no'),
(173881, 14819, '_regular_price', '13.9'),
(173882, 14819, '_sale_price', ''),
(173883, 14819, '_purchase_note', ''),
(173884, 14819, '_featured', 'no'),
(173889, 14819, '_sku', '9001616391101 (5)'),
(173893, 14819, '_price', '13.9'),
(173919, 14819, 'woocommerce_xml_disabled', '1'),
(173923, 14819, '_woocommerce_gpf_data', 'a:0:{}'),
(173938, 14819, '_thumbnail_id', '10851'),
(173939, 14819, 'total_sales', '0'),
(182118, 14819, 'woocommerce_xml_EAN', '9001616391101')
答案 0 :(得分:2)
这里有复杂的要求,wp_postmeta
表的键/值结构变得更加困难。让我们分两步解决它。第一种方法是将woocommerce_xml_EAN
字段已存在的行更新为相应的_sku
值,同时删除括号(1)
值using SUBSTRING_INDEX()
。在此步骤中,如果woocommerce_xml_disabled
为空,则1
也会设置为_sku
。
这一切都可以通过加入wp_postmeta
来实现。在联接的一侧,使用_sku
,另一侧使用post_id
进行匹配,以更新woocommerce_xml_EAN, woocommerce_xml_disabled
字段。
UPDATE
wp_postmeta sku
INNER JOIN wp_postmeta ean
ON sku.post_id = ean.post_id
-- Join conditions ensure only the needed keys are modified
AND sku.meta_key = '_sku'
AND ean.meta_key IN ('woocommerce_xml_EAN', 'woocommerce_xml_disabled')
SET ean.meta_value = CASE
-- the key/value store is crazy here :-)
-- First strip the (1) from the _sku and set the
-- resultant value into meta_value for the woocommerce_xml_EAN key
WHEN ean.meta_key = 'woocommerce_xml_EAN'
THEN TRIM(SUBSTRING_INDEX(sku.meta_value, '(', 1))
-- Then set '1' for the disabled field if _sku is empty
WHEN ean.meta_key = 'woocommerce_xml_disabled' AND sku.meta_value = ''
THEN '1'
-- But make sure to use the original value if sku wasn't empty!
WHEN ean.meta_key = 'woocommerce_xml_disabled' AND sku.meta_value <> ''
THEN ean.meta_value
END
WHERE sku.meta_key = '_sku'
AND ean.meta_key IN ('woocommerce_xml_EAN', 'woocommerce_xml_disabled');
现在是第二阶段,因为某些_sku
可能没有关联的woocommerce_xml_EAN
,因此需要添加INSERT
。我们将使用INSERT INTO... SELECT
使用null LEFT JOIN
来查找尚不存在的那些,并插入它们。它使用相同的SUBSTRING_INDEX()
技巧。
INSERT INTO wp_postmeta (post_id, meta_key, meta_value)
SELECT
-- Insert a new row with the post_id,
sku.post_id,
-- literal string for the EAN
'woocommerce_xml_EAN',
-- And the modified _sku value
TRIM(SUBSTRING_INDEX(sku.meta_value, '(', 1))
FROM
wp_postmeta sku
LEFT JOIN wp_postmeta ean
ON sku.post_id = ean.post_id
AND sku.meta_key = '_sku'
AND ean.meta_key = 'woocommerce_xml_EAN'
WHERE
sku.meta_key = '_sku'
-- NULL on the ean side of the join means it doesn't exist already
AND ean.meta_id IS NULL;
这是一个证明这一切都可行的示范。 http://sqlfiddle.com/#!9/30b84/2
在演示中,我添加了两个额外的post_id
,它们没有先前的值来让EAN验证是否为它们创建了woocommerce_xml_EAN
。他们的post_id
为14820, 14821
,您可以在结果集的底部找到它们。