Mine

/**
	 * Expecting a valid id, this will delete the given collection from the database.
	 * 
	 * @param 	cid	the id of the collection you want to delete
	 * @return	amount of effected rows
	 */
	public int deleteCollection(int cid) {
		String sql = "DELETE FROM " + getTagTable() + " WHERE commentid = '" + cid + "'";
		delete(sql);
		
		return deleteComment(cid);
	}