Hello,
I want to know if the following is an example of lossless decomposition, and why/why not?

R A B C
1 A 1000
2 B 2000
1 C 1000

The above is decomposed into:


A C
1 1000
2 2000
1 1000 and


B C
A 1000
B 2000
C 1000.

Will this be lossless? If so, why? If not, why not?



Thanks,
Prasanna