+
+create table local_group (
+
+ group_id integer primary key comment 'group represented' references user_group (id),
+ nickname varchar(64) unique key comment 'group represented',
+
+ created datetime not null comment 'date this record was created',
+ modified timestamp comment 'date this record was modified'
+
+) ENGINE=InnoDB CHARACTER SET utf8 COLLATE utf8_bin;