using text list field to save meta to the db

Hi,

Yes, it is possible to query by meta value. But for some specific field types like fieldset_text or group, the value stored in the database is a serialized array and it very hard to query by this value. You need to use another plugin to do that, read more here https://metabox.io/searchwp-metabox-integration/.

For simplicity, I recommend using text field to save the data to get easier when querying.

Hi,

All the field values (meta) are stored in the database and assigned to a post. See more here https://wordpress.org/support/article/custom-fields/

But it's very hard to query by value in a serialized string. You can read the query by meta value on the documentation https://developer.wordpress.org/reference/classes/wp_query/#custom-field-post-meta-parameters

Hi,

• Text List (cloneable)
• Fieldset Text
• Group

will save data in a serialized array. You can see on the documentation
https://docs.metabox.io/fields/text-list/#data
https://docs.metabox.io/fields/fieldset-text/#data

You can also read more on this article to choose the custom fields or custom taxonomies for query posts.
https://metabox.io/custom-fields-vs-custom-taxonomies/