Using MySQL
, I can do something like:
SELECT hobbies FROM peoples_hobbies WHERE person_id = 5;
My Output:
shopping
fishing
coding
but instead I just want 1 row, 1 col:
Expected Output:
shopping, fishing, coding
The reason is that I'm selecting multiple values from multiple tables, and after all the joins I've got a lot more rows than I'd like.
I've looked for a function on MySQL Doc and it doesn't look like the CONCAT
or CONCAT_WS
functions accept result sets.
So does anyone here know how to do this?
Best Answer
You can use
GROUP_CONCAT
:As Ludwig stated in his comment, you can add the
DISTINCT
operator to avoid duplicates:As Jan stated in their comment, you can also sort the values before imploding it using
ORDER BY
:As Dag stated in his comment, there is a 1024 byte limit on the result. To solve this, run this query before your query:
Of course, you can change
2048
according to your needs. To calculate and assign the value: