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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_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 ); -- Deleting all corresponding wp_postmeta.post_ids that don't have a match in wp_posts.id after the duplicate deletion above
Unknown column 'ID' in 'field list'