After installation, go to Admin page > Components > Table to CSV to get started.
Export Database table to CSV file
Sometimes you want to export some database tables to a CSV file for analysis or backup.
I have developed an extension for Joomla called "Table to CSV". It will list all the tables of the current database.
If you want to export any table, just click the "Export" button and wait for the download:

For large tables, it will show the progress so you can easily observe. This extension is suitable for Joomla 3, 4, 5 and 6.
What is wrong?
That imported page keeps on saying this, but nothing further is happening...
1. The "radio buttons" extra field doesn't transfer the values in the additional field, e.g., "yes" or "no," and only enters certain values into the #__fields_values database.
2. The "textarea" extra field with the "Use editor" option checked converts to "textarea" when it should be "editor."
3. In K2, the extra field group is assigned in the category. In Joomla Articles, the category is assigned in the extra field. It would be nice if this were automatically completed. A checkbox could be added if someone doesn't want this option.