How to addup column from two files ?

[netbackup1234]

Hi
I have two file ..
$ cat ora1
PARSCMG1TDP 1.100
PARSDB01_TDP 2.200
PARSDB02_TDP 1.401

$ cat ora2
PARSCMG1TDP 1.100
PARSDB01_TDP 2.200
PARSDB03_TDP 17.069

Then print third file which will print common entry from 1st column and add up second column like
$cat thirdfile
PARSCMG1TDP 2.200
PARSDB01_TDP 4.400

 

[PHV]

And what have you tried so far ?
Tip: you may consider awk's associative arrays ...

Hope This Helps, PH.
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