writing "recursive SQL"

From: susan lam <susanzlam_at_yahoo.com>
Date: Thu, 9 Sep 2004 12:27:16 -0700 (PDT)
Message-ID: <20040909192716.29904.qmail@web53302.mail.yahoo.com>

Hi,
I would like to write a SQL to recursively extract data from a table.

The algorithm is as follows:

SQL> select * from mytable;

        A B
---------- ----------

         1          2
         2          3
         3          4
         4          5
         5          6
         0          7
         7          8
         8          9

8 rows selected.

If A=3, output the corresponding value of B (ie 4), then match B (ie 4) with A and output the next corresponding value of B (ie 5) and so on... Recursion stops when B != A

A & B are unqiue and A=<value> is a user input value

The result I'm looking for is:

if A=3, then the output is:
4
5
6

if A=7, then the output is:
8
9

Is there a way to accomplish that in SQL?

thanks.

susan                 

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