Update JdbcPersistenceManager.java

src/plugins/monitoring/src/java/com/reucon/openfire/plugin/archive/impl/JdbcPersistenceManager.java

@@ -629,6 +629,7 @@ public class JdbcPersistenceManager implements PersistenceManager {
 			}
 		}
 		querySB.append(" )");
+		querySB.append(SELECT_CONVERSATIONS_GROUP_BY);
 		querySB.append(" ORDER BY ").append(CONVERSATION_END_TIME);
 
 		Connection con = null;
@@ -687,6 +688,8 @@ public class JdbcPersistenceManager implements PersistenceManager {
 			}
 		}
 		
+		querySB.append(SELECT_CONVERSATIONS_GROUP_BY);
+
 		try {
 			con = DbConnectionManager.getConnection();
 			pstmt = con.prepareStatement(querySB.toString());