Wordpress users and usermeta - joining multiple rows in one table to one row in another table

Question

I want to create a view from both the wp_users and wp_usermeta tables so that I can query rows in the view from an external application. Basic auth details are stored in wp_user

Answer 1

I found that Toote's solution works but is a performance hog on a MySQL database taking about 17 seconds to execute a "select * from users_with_meta_view".

I got this down to 0.0054 sec with a view structured like this instead:

CREATE OR REPLACE VIEW users_with_meta_view AS
SELECT
    u.id,
    u.user_login AS login,
    u.user_pass AS password,
    u.user_email AS email,
    (select meta_value from wp_usermeta where user_id = u.id and meta_key = 'first_name' limit 1) as first_name,
    (select meta_value from wp_usermeta where user_id = u.id and meta_key = 'last_name' limit 1) as last_name,
    (select meta_value from wp_usermeta where user_id = u.id and meta_key = 'country' limit 1) as country
FROM wp_users u