MySQL tidak memiliki dukungan untuk FULL OUTER JOIN.
Jadi jika Anda ingin meniru Full join di MySQL, lihat di sini .
Solusi yang biasanya disarankan terlihat seperti ini:
SELECT t_13.value AS val13, t_17.value AS val17
FROM t_13
LEFT JOIN
t_17
ON t_13.value = t_17.value
UNION ALL
SELECT t_13.value AS val13, t_17.value AS val17
FROM t_13
RIGHT JOIN
t_17
ON t_13.value = t_17.value
WHERE t_13.value IS NULL
ORDER BY
COALESCE(val13, val17)
LIMIT 30