Description of the illustration instances_clause.eps
INSTANCES = { ( 'instance_name' [, 'instance_name' ]... ) | ALL [ EXCEPT ( 'instance_name' [, 'instance_name' ]... ) ] }
INSTANCES = { ( 'instance_name' [, 'instance_name' ]... ) | ALL [ EXCEPT ( 'instance_name' [, 'instance_name' ]... ) ] }