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Editorial Team
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Asked: 2026-06-02T05:32:51+00:00

I have 1 table with users in them like so: id name email status

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I have 1 table with users in them like so:

id  name    email       status
---------------------------------
1   Jane    j@ne.do     active
2   Jack    j@ck.do     active
3   Jane    j@ne.do     inactive
4   Jack    j@ck.do     inactive

I also have data table like so:

id  user_id key         value
------------------------------
1   1       firts_name  Jane
2   1       last_name   Do
3   2       city        Amsterdam
4   2       first_name  Jack

Now i want to have them like so in one query:

id  name    email       status      firts_name  last_name   city
-------------------------------------------------------------------------
1   Jane    j@ne.do     active      Jane        Do          NULL
2   Jack    j@ck.do     active      Jack        NULL        Amsterdam
3   Jane    j@ne.do     inactive    NULL        NULL        NULL
4   Jack    j@ck.do     inactive    NULL        NULL        NULL

is that even possible in one query?

Normaly i do 2 queries and then combine the 2 in php but i am curious if this is possible.

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1 Answer

  1. Editorial Team

    This can be done pretty easily by joining the tables and using CASE statements:

    select
    u.id,
    u.name,
    u.email,
    u.status,
    max(case when a.`key`='first_name' then a.value end) as first_name,
    max(case when a.`key`='last_name' then a.value end) as last_name,
    max(case when a.`key`='city' then a.value end) as city
from
    users u
left join
    attr a on a.user_id = u.id
group by
    u.id

    Demo: http://www.sqlfiddle.com/#!2/66086/4

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