MySQL Befehl wieder deinstallieren?

[daruler]

Hallo,

der Gegenbefehl zu

ALTER TABLE phpbb_themes ADD theme_public tinyint(1) default '1' NOT NULL AFTER template_name;
ALTER TABLE phpbb_themes ADD theme_usergroup mediumint(7) default '0' NOT NULL AFTER theme_public;

wäre

ALTER TABLE phpbb_themes DROP theme_public tinyint(1) default '1' NOT NULL AFTER template_name;
ALTER TABLE phpbb_themes DROP theme_usergroup mediumint(7) default '0' NOT NULL AFTER theme_public;

?

Danke!