Fixed typo in sql statement. Fixed issue #4.

src/main/java/de/uniluebeck/mi/projmi6/db/DBHandler.java

@@ -48,9 +48,9 @@ public class DBHandler {
             "`LetzterBearbeiter`," +
             "`Ersteller`)" +
             "VALUES (?, ?, ?, ?, ?, ?, ?, ?, ?, ?, ?, ?, ?, ?, ?, ?)";
-    private static final String SELECT_ALL_STATIONEN = "SELECT *,r.abteilung AS abteilung" +
-            "FROM stammstation s " +
-            "INNER JOIN relfachrichtungstation r ON s.station = r.station";
+    private static final String SELECT_ALL_STATIONEN = "SELECT *,`r`.`abteilung` AS abteilung " +
+            "FROM `stammstation` s " +
+            "INNER JOIN `relfachrichtungstation` r ON s.station = r.station";
     private static final String SELECT_FAELLE_BY_PATID = "SELECT * FROM `fall` WHERE `patientid` = ?";
     private static final String INSERT_FALL = "INSERT INTO `fall`" +
             "(`Aufnahmedatum`," +