Join table rows by GROUP_CONCAT , failed! It's not working?

i don't know why it's not working.

"SELECT id GROUP_CONCAT(skill SEPARATOR ', ') FROM resume_skills GROUP BY id";

i have a table resume_skills, then two fields id and skill. it return an error like this one :

ERROR: You have an error in your SQL synt开发者_高级运维ax; check the manual that corresponds to your MySQL server version for the right syntax to use near 'GROUP_CONCAT(skill SEPARATOR ', ') FROM resume_skills GROUP BY id' at line 1

I haven't figure it out yet. Help?

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You miss comma(,) between id and group.

Right query:

SELECT id, GROUP_CONCAT(skill SEPARATOR ', ') FROM resume_skills GROUP BY id