CREATE TABLE /*_*/user_groups (
ug_user INT NOT NULL REFERENCES /*_*/mwuser(user_id) ON DELETE CASCADE,
ug_group NVARCHAR(255) NOT NULL DEFAULT '',
CREATE TABLE /*_*/user_groups (
ug_user INT NOT NULL REFERENCES /*_*/mwuser(user_id) ON DELETE CASCADE,
ug_group NVARCHAR(255) NOT NULL DEFAULT '',