Syntax MariaDB 10.1中窗口功能的替代方案

我有一个windows函数，在我的代码中按分区：

FROM   (SELECT wp_posts.id, 
                                     wp_postmeta.post_id, 
                                     post_title, 
                                     post_type, 
                                     meta_value, 
                                     Row_number() 
                                       OVER( 
                                         partition BY post_title 
                                         ORDER BY wp_postmeta.meta_value) rn 

但显然，10.2之前的MariaDB不支持这一点——我使用的是10.1。有人能推荐一些既高效又适用于MariaDB 10.1的替代代码吗

---

dbfiddle

告诉我们查询的目的。有两个表wp_posts包含post_title列和wp_postemta，其中包含meta_value列。这两个表都有一个整数递增的列wp_posts.ID、wp_postETA.post_ID，允许它们链接/联接1个匹配与1，2个匹配与2，以此类推。。post_title和meta_value不一定是唯一的，但是，我想按post_title进行分组选择。始终选择最低的meta_值，然后为该meta_值选择相应的wp_posts.ID遵循[groupwise maximum]标记以获取实现该目标的许多提示。告诉我们查询的意图。有两个表wp_posts包含post_title列和wp_postETA，其中包含meta_值列。这两个表都有一个整数递增的列wp_posts.ID、wp_postETA.post_ID，允许它们链接/联接1个匹配与1，2个匹配与2，以此类推。。post_title和meta_value不一定是唯一的，但是，我想按post_title进行分组选择。始终选择最低的meta_值，然后为该meta_值选择相应的wp_posts.ID跟随[groupwise maximum]标记以获取实现该目标的许多提示。

create table wp_posts (
  ID integer primary key auto_increment,
  post_title varchar(30),
  post_type varchar(30)
);

✓

create table wp_postmeta (
  ID integer primary key auto_increment,
  post_id integer,
  meta_key varchar(30) not null default '_regular_price',
  meta_value integer not null
);

✓

insert into wp_posts (post_title, post_type) values
('Apple Pie','Product'),
('French Toast','Product'),
('Shepards Pie','Product'),
('Jam Pie','Product'),
('Jam Pie','Product'),
('Plate','Not a Product'),
('Bucket','Not a Product'),
('Chequebook','Not a Product'),
('French Toast','Product'),
('French Toast','Product'),
('Banana','Product'),
('Banana','Product'),
('Banana','Product');

✓

insert into wp_postmeta (post_id, meta_value) values
(1,10),
(2,5),
(3,9),
(4,8),
(5,11),
(6,12),
(7,10),
(8,6),
(9,1),
(10,1),
(11,7),
(12,2),
(13,2);

✓

-- Deleting all duplicate products in wp_posts table 
DELETE FROM wp_posts 
WHERE  id IN (SELECT id 
              FROM   (SELECT id, 
                             post_title, 
                             post_type, 
                             meta_value 
                      FROM   (SELECT wp_posts.id, 
                                     wp_postmeta.post_id, 
                                     post_title, 
                                     post_type, 
                                     meta_value, 
                                     Row_number() 
                                       OVER( 
                                         partition BY post_title 
                                         ORDER BY wp_postmeta.meta_value) rn 
                              FROM   wp_postmeta 
                                     JOIN wp_posts 
                                       ON wp_postmeta.post_id = wp_posts.id 
                              WHERE  wp_posts.post_type = 'Product' 
                                     AND wp_postmeta.meta_key = '_regular_price' 
                             ) t 
                      WHERE  t.rn <> 1) AS aliasx); 

✓