mysql>
CONCAT_WS(, , [{, }...])
mysql>
mysql> SELECT CONCAT_WS(' ', 'cats', 'and', 'dogs');
+---------------------------------------+
| CONCAT_WS(' ', 'cats', 'and', 'dogs') |
+---------------------------------------+
| cats and dogs |
+---------------------------------------+
1 row in set (0.00 sec)
mysql>