Is it mandatory to use $wpdb->prefix in custom tables

It is mandatory, though it is not enforced.

Consider the scenario when two WordPress site has been setup in the same database. One with prefix wp_ and another with wp2_. If you install your plugin in both of the sites with the prefix, your created tables will be wp_liveshoutbox for first site and wp2_liveshoutbox for the second site. But if you omit the prefix, both of the site will be using the same table named liveshoutbox and the whole thing will break up.

Related Posts:

  1. WordPress and multithreading
  2. Actions or filters fired when data is saved in a custom table
  3. Custom Plugin Database relations
  4. Activation hook not creating table
  5. Creating table with plugin is not working
  6. How to create database table, add data, update and delete using wpdb via plugins?
  7. Using WPDB to output raw XML fails because of wp-blog-header.php
  8. wpdb->prepare and mysql UPDATE – how is it done?
  9. dbDelta not installing database
  10. $wpdb->update Issue
  11. WordPress database error: [Query was empty] – using $wpdb->prepare()
  12. Why doesn’t my Table get created?
  13. How to get inserted row IDs for bulk/batch insert with wpdb query?
  14. Update database record in plugin
  15. WordPress plugin tables become corrupt
  16. multiple record insert creating many duplicate records
  17. Should I use wpdb prepare?
  18. Default table collation on plugin activation?
  19. Using a database view = evil incarnate?
  20. Check for success of $wpdb->update() correctly
  21. Getting wrong relationship value in $args in wp_Query?
  22. What is the added “complexity” of custom tables?
  23. How is the data stored in the database?
  24. How to modify post content before writing to database?
  25. $wpdb->insert is changing a value
  26. Retrieving custom fields with $wpdb->get_results
  27. Is there any reason only 1 (my) IP would be added to this table using $wpdn->insert?
  28. How to use mysql IN statement with wpdb update method?
  29. How to store data for posts/pages built with drag-n-drop builder?
  30. What for the tables ending with the meta used in database of wordpress?
  31. dbDelta() Error – Incorrect index name ” for query ALTER TABLE
  32. Update/insert only a column of database table
  33. How to Create database table when Plugin installed/activated, and delete database when Plugin deleted
  34. Where to store the name of a custom table?
  35. include wp-blog-header not working on MAMP
  36. I’m designing a plugin to create database indexes. Suggestions?
  37. WordPress database error for query INSERT INTO
  38. How to connect to AWS RDS external database (not for the core WordPress db)
  39. SQL query for custom taxonomy slugs
  40. Issue regarding $wpdb->prepare()
  41. Error on inserting a form value to database
  42. Are there any scripts, classes, and/or functions built-in to WP for a plugin to export/import its saved data from wp_options?
  43. Strange issue saving custom field data for a WooCommerce order
  44. how to search users by ajax live search
  45. Form doesnt save to database
  46. Adding custom end points, No error line
  47. Intermittent database errors when accessing WordPress database
  48. Updating Woocommerce Settings API when WordPress Settings API saved and vise versa
  49. Update results, Before deleting the related category [closed]
  50. Storing data in wordpress database from ajax call from different website
  51. Is using custom table to suit business needs instead of transients a big hit to page load speed?
  52. Create a table with wordpress plugin boilerplate
  53. Optimising a big WordPress site
  54. dbDelta SQL Query Not Working
  55. Can I create a table on my DB without creating a plugin?
  56. How to access custom WordPress database tables
  57. What is the best way to store a few fields?
  58. Delete data from database using row action
  59. How do I have now a duplicated user entry if this is not allowed (and I cannot replicate it)?
  60. Issue running db create table query from static method
  61. Alternative functions for mysql_free_result and mysql_ping in wordpress functions
  62. Make Database query only when option is updated
  63. Can we intercept user_login and user_pass from a wp_login_form?
  64. Two different wordpress sites – same server and IP address. Gaining Access to database 1 of 2
  65. Plugin Development: Storing and Manipulating Data That Fits JSON in Database
  66. How to avoid conflicts with db.php / $wpdb and other plugins that decide to use them?
  67. How do I debug an error that a plugin is causing?
  68. $wpdb in php 5.5
  69. Update plugin settings option_name for big plugin update
  70. select a single val though a table in wordpress
  71. Plugin to create Posts and Forums then choose category and parent forum
  72. How to display specific data from a custom table to logged in users with a custom role
  73. $wpbd->insert_id is returning null
  74. Error code when migrate
  75. $wpdb->delete not working for me
  76. What is my error trying to create a new table in the database?
  77. How to securely controlling data without keeping it in postmeta?
  78. Dynamically modify content added to table via javascript
  79. WordPress how do I echo SUM from a column of a MySQL table by user id AND type_operation
  80. WordPress Query doesn’t return the correct value
  81. using wordpress acf shortcods in tables goes outside the table
  82. Use admin-post to submit form data to external database
  83. Save in my custom admin page and redirect to the saved object
  84. Relational / Associate tables using native WordPress functionality
  85. How to store in the database directly the translation?
  86. How and when would I implement some code which would take data from one part of the Db and put it in another?
  87. How to implement pagination into a wpdb->result query?
  88. Displaying settings information in a table
  89. Ajax not working to insert, query and result data
  90. Associating special meaning with user id 0
  91. Google does not index data from custom table used for a plugin
  92. What method should I use to store my plugin data (multi level menus with options on each item)
  93. How to add additional field in a table row after creating a table?
  94. Nothing happens on WordPress Update command
  95. Fixing plugin for wpdb::prepare
  96. Can I use an array to create multiple tables?
  97. How to create a database table in WordPress using PHP
  98. Programmatically creating posts based on external JSON feed (asynchronously)
  99. WordPress database error: [Table ‘bitnami_wordpress.questions’ doesn’t exist]
  100. Making a user platform reachable by a qr code on a pin-back-button [closed]

Leave a Comment

techhipbettruvabetnorabahisbahis forumutaraftarium24eduseduseduseduseduseduseduedueduedu