Question

I can’t seem to grasp how I can select records when the records of one user span multiple rows.

Here is the schema of the table.

user_id  key          value
------------------------------------------
1        text         this is sample text
1        text_status  0
2        text         this is sample text
2        text_status  1

from the above table/row you can see that each user has info that has multiple rows. So in this case how do I select say “All the IDs, text value where text_status is “1”?

And to complicate it 1 step further, I need the email address of these accounts which is on another table. How can I write 1 select statement to pull in the email address as well? I know there is a JOIN statement for this but it’s a bit complicated for me especially I can’t even figure out the first part.

Added Note I must state that this table schema is a WordPress default table wp_usermeta..

Answer 1

    SELECT t1.*
      FROM tbl t2
INNER JOIN tbl t1 ON t1.user_id = t2.user_id
                 AND t1.key = 'text'
     WHERE t2.key = 'text_status'
       AND t2.value = '1'