database - How do I print a triangle of stars using SQL

Question

Is it practically possible to create a triangle of stars like this as below in SQL.I know that this could be done easily in any other programming language like C,C++,Java but want to know whether it is really possible with just SQL or PL/SQL.I tried working on it with dual table in Oracle but couldn't get through it.

  *              *
 * *             * * 
* * *    or      * * *

Can someone please shed somelight if anyone knows about it.

Answer 1

The simplest approach would be something like this. You can get more sophisticated particularly if you want to build the equilateral triangle rather than the right triangle.

SQL> ed
Wrote file afiedt.buf

  1  select rpad( '* ', level*2, '* ' )
  2    from dual
  3* connect by level <= 3
SQL> /

RPAD('*',LEVEL*2,'*')
--------------------------------------------------------------------------------
*
* *
* * *