How to use GROUP BY to concatenate strings in MySQL?

Question

Basically the question is how to get from this:

foo_id   foo_name
1        A
1        B
2        C

to this:

foo_id   foo_name
1        A B
2         


        

Answer 1

SELECT id, GROUP_CONCAT( string SEPARATOR ' ') FROM table GROUP BY id

More details here.

From the link above, GROUP_CONCAT: This function returns a string result with the concatenated non-NULL values from a group. It returns NULL if there are no non-NULL values.