How to group mysql rows with same column value into one row?
Use GROUP_CONCAT() like this:
SELECT k.id, GROUP_CONCAT(d.value) FROM keywords AS k INNER JOIN data as d ON k.id = d.id GROUP BY k.idAlso, you may need to do ORDER BY d.name to get exact order of values as you want. Like this:
SELECT k.id, GROUP_CONCAT(d.value ORDER BY d.name separator ' ') FROM keywords AS k INNER JOIN data as d ON k.id = d.id GROUP BY k.id