delete duplicates wp_postmeta

This should do it:

DELETE t1 FROM wp_postmeta t1, wp_postmeta t2 
WHERE t1.meta_id > t2.meta_id 
AND t1.meta_key = t2.meta_key 
AND t1.post_id = t2.post_id

Related Posts:

  1. Save both current and new version of post meta
  2. How to delete duplicate records in wp_postmeta database table?
  3. How do I retrieve the slug of the current page?
  4. Most efficient way to get posts with postmeta
  5. Get posts by meta value
  6. Explanation of update_post_(meta/term)_cache
  7. How to extract data from a post meta serialized array?
  8. How to save an array with one metakey in postmeta?
  9. WordPress is stripping escape backslashes from JSON strings in post_meta
  10. How can I get the post ID from a WP_Query loop?
  11. Check if Post Title exists, Insert post if doesn’t, Add Incremental # to Meta if does
  12. How to update_post_meta value as array
  13. Adding meta tag without plugin
  14. What’s the point of get_post_meta’s $single param?
  15. What is the different between an attachment in wp_posts and an attachment in wp_postmeta?
  16. How to edit a post meta data in a Gutenberg Block?
  17. Sanitizing integer input for update_post_meta
  18. post formats – how to switch meta boxes when changing format?
  19. Execute action after post is saved with all related post_meta records (data)
  20. Lack of composite indexes for meta tables
  21. Get a single post by a unique meta value
  22. if get_post_meta is empty do something
  23. How we get_post_meta without post id
  24. How get post id from meta value
  25. What is the code to get the download link for a product in WooCommerce?
  26. Safe to delete blank postmeta?
  27. advanced custom fields update_field for field type: Taxonomy
  28. update_post_meta not saving when value is zero
  29. Content hooks vs User hooks
  30. Meta compare with date (stored as string) not working
  31. Trying to get custom post meta through Jetpack JSON API [closed]
  32. How to update/insert custom field(post meta) data with wordpress REST API?
  33. Restrict post edit/delete based on user ID and custom field
  34. get_post_meta returning empty string when data shows in the database
  35. publish_post action hook doesn’t give post_meta_data
  36. Remove WordPress.org Meta link
  37. Remove post meta keys
  38. How to access the post meta of a post that has just been published?
  39. Why time functions show invalid time zone when using ‘c’ time format?
  40. Why is get_post_meta returning an array when I specify it as single?
  41. How to update/delete array in post meta value?
  42. How to get all term meta for a taxonomy – getting term_meta for taxonomy
  43. Adding an assisting editor box to Post page
  44. delete unused postmeta
  45. Should I sanitize custom post meta if it is going to be escaped later?
  46. Add post meta based on another post meta value before publish post
  47. How do I retrieve multi-dimensional arrays from the wp_postmeta table, & display on a website?
  48. Front-end update_post_meta snippet displays white screen?
  49. Query between two meta values?
  50. Get Advanced Custom Fields values before saving [closed]
  51. Give extra post-meta to RSS feeds
  52. How to get meta value in wp_attachment_metadata
  53. WP REST API “rest_no_route” when trying to update meta
  54. Clean up output added via wp_head()
  55. List posts under meta_value heading
  56. Why am I getting an infinite loop with have_posts?
  57. get_post_meta – get a single value
  58. delete value 0 in post meta [closed]
  59. Can I safely delete a record, manually, in the wp postmeta table?
  60. How to store post meta in an array?
  61. What action hook updates post meta?
  62. Can’t translate the post meta data (Date) in another language
  63. get_post_meta / update_post_meta array
  64. adding a URL to a post meta
  65. Exclude a category from the filed under list
  66. Short of raw SQL, can I query for multiple attachment metadata that have a given array key?
  67. How do I access post meta data when publishing a new post in Gutenberg?
  68. update_post_meta() not working when used with WordPress action
  69. Using Advanced Custom Field (ACF) to insert meta description on each page
  70. Triple meta_key on custom SELECT query
  71. get_post_custom()
  72. Adding meta data to an attachment post
  73. update_post_meta not adding anything.(Nor add_post_meta)
  74. loop through all meta keys with get_post_meta
  75. Get posts by meta value with date
  76. How to add meta tag to wordpress posts filter?
  77. Are multiple values from get_post_meta guaranteed to be ordered?
  78. Identifying Importer Posts
  79. Get updated post meta on save_post action?
  80. Get post from meta_key and meta_value
  81. Add a post metadata if only the key and value does not exist
  82. get_post_meta returns bool(false)
  83. How metadata API works?
  84. Correct processing of `$_POST`, following WordPress Coding Standards
  85. Metabox Data not being saved [closed]
  86. How can I get values using key in Carbon Fields from Multiselect?
  87. Delete post meta conditionally after save post
  88. How to sanitize post meta field value?
  89. Problem With Order Item Meta In Woocommerce
  90. Job of meta_key meta_value fields in database tables
  91. WordPress Action Hooks and Post ID?
  92. Post IDs missing on delete_postmeta action hook
  93. How to store Gutenberg ColourPicker RGBA as metadata
  94. Options to get my custom post type metadata via the WordPress API
  95. Is it possible to update a post meta field through REST API if the format of it when registered is nested?
  96. How trigger to save post when updating post meta
  97. Create a Metabox that behaves Like a Taxonomy Box
  98. Views count with time limit per IP
  99. Generate an Email address from that of the Post Author
  100. Query 2 meta key values and a category