How to use GROUP_CONCAT in a CONCAT in MySQL

Question

If I have a table with the following data in MySQL:

id       Name       Value
1          A          4
1          A          5
1          B          8
2               


        

Answer 1

 SELECT id, GROUP_CONCAT(CONCAT_WS(':', Name, CAST(Value AS CHAR(7))) SEPARATOR ',') AS result 
    FROM test GROUP BY id

you must use cast or convert, otherwise will be return BLOB

result is

id         Column
1          A:4,A:5,B:8
2          C:9

you have to handle result once again by program such as python or java