http://www.perlmonks.org?node_id=989730

aartist has asked for the wisdom of the Perl Monks concerning the following question:

Dears,
I have Table 1 and Table 2.
Table:1
A	B	C
1	0	2
0	1	3

Table:2
A	P	Q	R
1	1	0	1
1	0	1	0
0	0	0	1

Table:3
B	C	P	Q	R
0	2	1	0	1
0	2	0	1	0
1	3	0	0	1
Each Table has columns. I am looking to produce Table 3 from Table 1 and Table 2. See that Column A is listed in Table 1 as well as in Table 2.
Column A in Table 1, have "values" in Table 2 ( columns P,Q,R). I like to merge these values and produce table 3, replacing entries in column A. An entry in column A can have multiple values as seen in Table 2 for A=1. In Table 3, columns B and C are almost same as that in Table 1, but they take care of 'multiple values for column A'.

Please also note that column A can have multiple entries for same number (Here A=1) in Table 1 as well.
example:

Table:1
A	B	C
1	1	1
1	0	2
0	1	3

Table:2
A	P	Q	R
1	1	0	1
1	0	1	0
0	0	0	1

Table:3
B	C	P	Q	R
1	1	1	0	1
1	1	0	1	0
0	2	1	0	1
0	2	0	1	0
1	3	0	0	1

How should I go about this? Any Data/Table/Matrix modules can help?
Thanks.