Why is my custom table not being created in WordPress?

The most common cause is incorrect SQL syntax within the dbDelta function. Ensure you have two spaces after 'PRIMARY KEY' and that the primary key definition is on its own line. Also, verify that you have included the upgrade.php file.

Can I use standard SQL CREATE TABLE instead of dbDelta?

Yes, you can use $wpdb->query(), but it is not recommended. dbDelta is idempotent, meaning it handles updates and modifications safely without throwing errors if the table already exists.

Which hook should I use for themes vs plugins?

For plugins, use 'register_activation_hook'. For themes, use 'after_switch_theme' as themes do not have a standard activation hook like plugins do.

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Create Custom Database Table on Theme Activation: 5 Easy Steps

Mar 8, 2026 339 Views

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