mysql>
mysql> SELECT CASE BINARY 'B'
-> WHEN 'a' THEN 1
-> WHEN 'b' THEN 2
-> END;
+---------------------------------------------------------------------+
| CASE BINARY 'B'
WHEN 'a' THEN 1
WHEN 'b' THEN 2
END |
+---------------------------------------------------------------------+
| NULL |
+---------------------------------------------------------------------+
1 row in set (0.00 sec)
mysql>