MAX in WHERE not possible

You cannot use MAX() in a WHERE clause, instead use a subquery.

The ORDER BY is also unneeded, because we only select the maximum. So what to order, there is only one number (even if multiple entries with the same number).

documents/musterloesung-db-klausur-b/d3e.sql

@@ -1,5 +1,4 @@
 SELECT berater_id, name, anzahl
     FROM Beratungsanzahl
     JOIN Berater ON Berater.berater_id = Beratungsanzahl.berater_id
-    WHERE anzahl = MAX(anzahl)
-    ORDER BY anzahl DESC
+    WHERE anzahl = (SELECT MAX(anzahl) FROM Beratungsanzahl)