Mega Code Archive
SELECT ELT(-1, A, B, C, D)
mysql>
mysql> SELECT ELT(-1, 'A', 'B', 'C', 'D');
+-----------------------------+
| ELT(-1, 'A', 'B', 'C', 'D') |
+-----------------------------+
| NULL |
+-----------------------------+
1 row in set (0.00 sec)
mysql>