（er_parse_error）＃1064

Question

我尝试了3种不同的删除方法。 如果条件合适，我想删除表buylist_products中的行。

尝试1：

DELETE FROM parkage_buylist_products bp, parkage_productsmeta pm, parkage_buylist b WHERE bp.product_id = pm.product_id AND (pm.meta_key = 'we_buy_price' OR pm.meta_key = 'we_buy_rule') AND pm.meta_value = 0 AND bp.order_id = b.order_id AND b.status = 'in_progress' AND b.order_id = 24

尝试2：

DELETE FROM parkage_buylist_products bp  
LEFT JOIN parkage_productsmeta pm, parkage_buylist b  
ON bp.product_id = pm.product_id 
WHERE (pm.meta_key = 'we_buy_price' OR pm.meta_key = 'we_buy_rule') 
AND pm.meta_value = 0 
AND bp.order_id = b.order_id 
AND b.status = 'in_progress' 
AND b.order_id = 24

尝试3：

DELETE FROM parkage_buylist_products bp, parkage_buylist b    
WHERE bp.order_id = b.order_id 
AND b.status = 'in_progress' 
AND b.order_id = 24 
AND bp.product_id IN (SELECT pm.product_id 
                  FROM parkage_productsmeta pm
                WHERE (pm.meta_key = 'we_buy_price' OR pm.meta_key = 'we_buy_rule') 
                AND pm.meta_value = 0

对于我尝试过的第一个，删除bp，删除bp。*它会给我一个语法错误。

感谢您的帮助

Answer 1

请尝试以下方法......

DELETE parkage_buylist_products,
       parkage_productsmeta,
       parkage_buylist
FROM parkage_buylist_products
JOIN parkage_productsmeta
JOIN parkage_buylist
WHERE parkage_buylist_products.product_id = parkage_productsmeta.product_id
  AND parkage_buylist_products.order_id = parkage_buylist.order_id
  AND ( parkage_productsmeta.meta_key = 'we_buy_price' OR
        parkage_productsmeta.meta_key = 'we_buy_rule' )
  AND parkage_productsmeta.meta_value = 0
  AND parkage_buylist.status = 'in_progress'
  AND parkage_buylist.order_id = 24;

使用条件delete from many tables at once sql进行快速搜索后，我在delete from two tables in one query找到了该页面。我从他们最受欢迎的答案（由Eric）中选择了第二个选项并使用您的代码进行了修改。

根据我的研究，这应该从DELETE那些符合指定条件的记录后面指定的表中删除，这些记录与您的问题中的相同。请注意，我已经删除了别名 - 我更喜欢在没有它们的情况下工作。大概你仍然可以在这里使用它们。

如果您有任何问题或意见，请随时发表评论。