|
mysql> select id,group_concat(content separator ''),mykey
-> from test group by mykey;
+------+------------------------------------+-------+
| id | group_concat(content separator '') | mykey |
+------+------------------------------------+-------+
| 4 | 很好你呢 | NULL |
| 1 | 你好吗 | 999 |
+------+------------------------------------+-------+
2 rows in set (0.00 sec) |
|