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st: RE: data management problem

From   "Wanli Zhao" <>
To   <>
Subject   st: RE: data management problem
Date   Sun, 6 May 2007 03:08:15 -0400

Hello, guys! I need help on a data management problem.
The data looks like follows:

firm	dept	product
1	a	a, b
1	b	c, r
1	c	d, a
2	d	d, f
2	e	I, y
2	f	g

Firm 1 & 2 each has some departments. Each department has some products. I
want to a variable which lists all the products a firm has (a, b, c, d, r
for firm 1) and for firm 2 (d, f, I, y, g). Any help would be appreciated.


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