DROP AGGREGATE [ IF EXISTS ] { $name$ ( $aggregate_signature$ ) } [ , ... ] [ CASCADE | RESTRICT ]

where $aggregate_signature$ is:

* |
    { [ $agg_argmode$ ] [ $argname$ ] $argtype$ } [ , ... ] |
    [ { [ $agg_argmode$ ] [ $argname$ ] $argtype$ } [ , ... ] ] ORDER BY { [ $agg_argmode$ ] [ $argname$ ] $argtype$ } [ , ... ]