what outputs/illustrates a table's structure? - WAS: Re: Hard? query to with group order by group head's name

[Govinda]

> My table group_member looks like this:
> +-----------+-------+---------+
> | member_id | name  | head_id |
> +-----------+-------+---------+
> |         1 | Elim  |    NULL |
> |         2 | Ann   |       1 |
> |         3 | David |    NULL |
> |         4 | John  |       3 |
> |         5 | Jane  |       3 |
> +-----------+-------+---------+

I see such nice formated text output serving to illustrate people's  
tables and I think it must be due to some code which is spitting that  
out, rather than people typing so painstakingly.  What is that  
function/MySQL/code?