Hello Unix gurus,
I am new to Unix. I am working on some dummy project which involves unix scripting.

I have a query :

There is a file Number.dat which is of form say

AAA|123|4563|animal
AAA|1234|45634|animal2
BBB|123444|456312|bird
BBB|123445|456313|bird2

Here AAA,BBB are headers.
Now I want to sort Number.dat based on header and place them in different header.dat file.
How do I do that? I would be really greatful if some one helps me.


Thanks in advance
Vinay