Where are custom field values stored in the database

From the codex for custom fields:

The PostMeta information is stored in a new table, $wpdb->postmeta. This table has four fields:

‘meta_id’ – A unique id for each entry.
‘post_id’ – The ID of the post for this metadata.
‘meta_key’ – The name of the ‘key’.
‘meta_value’ – The value associated with the key.

This of course assumings that ACF uses the default WordPress stucture and not a custom database.

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