explain what the mRNA table is and describe its relationship with amino acids and proteins. How are individual?

mRNA table, also known as codon table, is a table that allows use to tell the amino acid coded by the RNA formed from transcription. Each codon (about 64 codons) are there that specify one amino acid only (except the Stop codons, 3 in number). Through codon table,  we can figure out the amino acid that a codon is going to give out when read at the ribosome.
http://www.biogem.org/codon.jpg
The link contains the RNA codon table, that is used for RNA only.
Suppose you have mRNA sequence as AUG GUA GCA (contains 3 codons)
From codon table, you can tell the amino acid coded by the codon. The table consists 3 main sides (Specifying first base, second base and third base). Looking for a codon is just like finding a word  in a dictionary. So you take first codon AUG, then look for A in first base, then U in second base under A, and then G in third base under A and U, and you get AUG in the first column saying Methionine (Start codon).
Similarly other codons can be calculated.
Finally you can tell the amino acids made by the sequence,
Here, Methionine, Valine, alanine.

Individual proteins are alike as the according to the coding rule, one amino acid can be coded by various codons and therefore the proteins can be alike, but genetic code maybe different.