mysql: Case/When Abfrage liefert unerwartetes Ergebnis

[ursus contionabundo]

Das ist zu erwarten.

> select "uzzuuisdfhiwq" = 0;

+---------------------+
| "uzzuuisdfhiwq" = 0 |
+---------------------+
|                   1 |
+---------------------+
1 row in set, 1 warning (0.00 sec)


> select  0 = "uzzuuisdfhiwq";

+---------------------+
| 0 = "uzzuuisdfhiwq" |
+---------------------+
|                   1 |
+---------------------+
1 row in set, 1 warning (0.00 sec)