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

As far as I know, you are doing it the right way and just need to put them all together:

SELECT
    u1.id,
    u1.login,
    u1.password,
    u1.email,
    m1.meta_value AS firstname,
    m2.meta_value AS lastname,
    m3.meta_value AS country
FROM wp_users u1
JOIN wp_usermeta m1 ON (m1.user_id = u1.id AND m1.meta_key = 'first_name')
JOIN wp_usermeta m2 ON (m2.user_id = u1.id AND m2.meta_key = 'last_name')
JOIN wp_usermeta m3 ON (m3.user_id = u1.id AND m3.meta_key = 'country')
WHERE
    -- CONDITIONS ON the user you want to select based any field