mysql query; rename 2 values from single column

Question

I have a table like this. I am trying to query values from column id5 and give them new names.

 id      id2   id3 id4   id5
----------------------------
174977  20214 209 8278  1
174976  20214 209 8277  abc123
174975  20214 209 8276  33333
174974  20214 209 8275  My Name

here is my query

select a.id5 as qty, b.id5 as itemnum 
from mytable a where id4 = 8278, 
mytable b where id4 = 8276

so that I get an output like this.

qty      itemnum  
----------------
1        33333

Can anyone help please? Thank you

Answer 1

SELECT MAX(CASE WHEN id4 = 8278 THEN id5 END) qty
     , MAX(CASE WHEN id4 = 8276 THEN id5 END) itemnum
  FROM mytable
 GROUP 
    BY id2
     , id3;