MySQL-如何在有条件的情况下将值从不同的列显示到同一行

Question

below is my code,

select DISTINCT C.session_id,C.status,C.uut_serial_num,D.error_code from 

(Select A.*

From uut_info A, session_info B

Where A.session_id=B.session_id

And A.uut_serial_num ="ACNW6676"
and A.status ="Fail" 
And B.test_spec<>'DBG'

Order By A.timestamp Desc

LIMIT 0,4) C left join subtest_info D 

on C.uut_serial_num = D.uut_serial_num
and C.session_id = D.session_id

order by C.timestamp Desc

Result:

session_id              status  uut_serial_num  error_code
7385122219fa35c37942511 Fail    ACNW6676    500004
7385122219fa35c37942511 Fail    ACNW6676    40555
7385122219fa35c37942511 Fail    ACNW6676    40187
7385122219fa35c37942511 Fail    ACNW6676    
412afc12a33601011721415 Fail    ACNW6676    
412afc12a33601011721415 Fail    ACNW6676    100001
9213232191116c821a59f86 Fail    ACNW6676    
9213232191116c821a59f86 Fail    ACNW6676    500005
11809c9a3382624993f5104 Fail    ACNW6676    40187
11809c9a3382624993f5104 Fail    ACNW6676    
11809c9a3382624993f5104 Fail    ACNW6676    40143
11809c9a3382624993f5104 Fail    ACNW6676    500005

but how to make/show if same session_id the error_code will mix in 1 row and remove empty like below, and same into tmp table?

    session_id          status  uut_serial_num  error_code
7385122219fa35c37942511 Fail    ACNW6676    500004,40555,40187

i tried with GROUP_CONCAT or If condition but still not able to get the result i want :-

select DISTINCT C.session_id,C.status,C.uut_serial_num,GROUP_CONCAT(D.error_code) from

Answer 1

Get rid of distinct and use group by

Select your_columns, 
group_concat(d.error_code) from 
your_table group by session_id;