FULL OUTER JOIN:
SELECT column_name(s)
FROM table1
FULL OUTER JOIN table2
ON table1.column_name=table2.column_name;
Mysql中可以使用UNION,同时联合LEFT JOIN 与RIGHT JOIN，如：
SELECT column_name(s) FROM table1 LEFT JOIN table2 ON table1.name = table2.name
UNION
SELECT column_name(s) FROM table1 RIGHT JOIN table2 ON table1.name =table2.name;