Are custom tables in the database overwritten when WordPress is updated to new versions?

During a WP ‘core’ update that happens to modify the database, I believe that there is no ‘overwrite’ of tables or removing tables in the database.

If you add a new table to the database, that table will ‘survive’ the next WP core upgrade.

You’ll only lose data if you reinstall from scratch, and specify another WP table name. But there would be few reasons to do that.

A plugin or theme will make some changes to the tables. A plugin might have options that are stored in a table. And their upgrade might add/modify one of their own tables, but not the WP-based ones.

Updates are good to do, IMHO. I check for core/themes/plugin updates daily, and install daily when needed.

Related Posts:

  1. Prevent changing the length of post_name column on WordPress Update
  2. Can’t update database after wordpress update from 3.8.1 to 4.4.1
  3. What ALL can cause “Another update is currently in progress.”? [closed]
  4. Trigger Plugin database update after git pull
  5. How to get the SQL of the changes made to the database from an update or upgrade?
  6. Update from 4.5 to 4.6 failing
  7. Migrate database between 2 different wordpress version
  8. Is database deleted on clicking “reinstall” button in WordPress updates?
  9. What is the best way to resurrect and update my old WordPress site?
  10. Disable Database Update Required ? break my website
  11. Brandoo WordPress Unable to Update to WordPress 4.2.2
  12. Will adding & modifying default WordPress table index break future WordPress update
  13. Updating seperate database when post attachment is changed
  14. Adding last value from Database as text in WordPress Page
  15. get_the_terms is not working
  16. wp-config was suddenly updated
  17. Can’t connect to MySQL server on ‘127.0.0.1’ (10061) (2003)
  18. Relaunch 4.2 utf8mb4 database upgrade
  19. Get error messages when $wpdb->insert() returns false?
  20. Does dbDelta delete columns as well?
  21. Where can I find the database changes between WordPress versions?
  22. When is it appropriate to create a new table in the WordPress database?
  23. Special characters in WordPress UTF-8 [closed]
  24. How to delete outdated, wrongly sized images in _wp_attachment_metadata?
  25. $wpdb variable throw this error Call to a member function get_results() on a non-object in
  26. Extend the wp_users table
  27. I have a problem with my WordPress DB after I tried to install multi-site
  28. Database sync between local and production
  29. Database error Deadlock found when trying to get lock; try restarting
  30. Connect Second Database to WordPress
  31. update_user_meta() does not work
  32. Query from a different database than the default
  33. Need of separate security plugins for both root and subfolder sites WordPress?
  34. Escaping / encoding data before insert into a database?
  35. Error: SELECT SQL_CALC_FOUND_ROWS
  36. Storing data for a wordpress plugin
  37. Transient feeds and caching error
  38. get_tags() return an empty array after added tags with wp_insert_term()
  39. WordPress database import: Row size too large
  40. Advanced SELECT query with condtional statements
  41. Why do mass updates to post_content shows in front end, but not in edit screen?
  42. How to disable (get rid of) home page main loop entirely?
  43. How can I (semi) automate a database export and import to a different location?
  44. Insert post in another database
  45. Improve performance by removing unnecessary database queries
  46. Redirecting to old domain after migration website
  47. Localhost keeps redirecting to live domain
  48. How to get membershiplevel from WordPress Database?
  49. Child parent relationship inside WP DB
  50. Copying database tables to new database
  51. Duplicating Complete WordPress Install for Development and then Redeployment?
  52. What does wp_term_taxonomy.parent reference?
  53. How to combine multiple wp_insert_post into one in order to gain better performance
  54. How to get nav_menu_item_id and slug from wp database
  55. Two prefixes in database? Which one is valid?
  56. Is there a way to execute a php script outside WordPress?
  57. Problem in using wpdb
  58. How can I restrict php mail() to only send me one email after a db error
  59. pull data from a remote wordpress database
  60. Create database on installation
  61. How to delete post comments from the database via SQL statement?
  62. Users table missing from Database [closed]
  63. Why does changing Database Table Prefixes result in loss of content?
  64. Options on how to Display member specific data from a MS SQL database
  65. How to connect and insert data in database of wordpress?
  66. wp_option table error while importing
  67. wp_insert_user not creating account correctly when ID is manually set
  68. Installing local to live WP into subdirectory
  69. What is wrong here? Issue with post_id and meta_value
  70. Counting post and changing roles in mysql database. Query not code
  71. MSQL database wp_postmeta has meta key tve_revision
  72. Deleting empty meta key values
  73. Occasional Error Establishing a Database Connection
  74. WP 5.5, child themes, customizer and a weird cache issue
  75. Display user data in numbered list
  76. Removing old_slug and old_date from WordPress Database
  77. How do I change several broken URLs in a several wordpress databases in the fastest way?
  78. Best way to store 1 billion+ posts?
  79. Optimize WP site for millions of posts
  80. Why am I being prompted to reinstall wordpress?
  81. What’s the easiest way to connect external database and display data on wordpress?
  82. Character encoding issue – black diamond question marks on imported post excerpts
  83. WordPress Migration – Issue with admin panel changes
  84. Reinstall wordpress/mySQL caused database problem
  85. How To connect to the same WordPress database with different database user
  86. How much post meta data is too much?
  87. Call to a member function insert()
  88. I have include wp-config, should I add global $wpdb also?
  89. Localize strings from db
  90. Create a new table on the database and save parameters from a contact form
  91. How to have WP Search widget index dynamically generated content?
  92. Preventing concurrent update of data
  93. Redirect Issue: WordPress database
  94. Category not displaying in add post, edit post, and categories page.
  95. Creating Tables in WordPress Database
  96. Calling update_user_meta inside of another function doesn’t work
  97. $wpdb->prepare returns empty array
  98. Prevent creation of unused database tables?
  99. How to store a plain password in WordPress database in another field
  100. How to stop WordPress from using utf8mb4_unicode_ci collation
error code: 523