echo $begrüßung;
INSERT INTO tabelle SET schluessel = ((SELECT MAX(groesse) FROM tabelle)+1);
[Another restriction is that currently you cannot modify a table and select from the same table in a subquery. This applies to statements such as DELETE, INSERT, REPLACE, and UPDATE.](http://dev.mysql.com/doc/mysql/en/subqueries.html)
echo "$verabschiedung $name";