如何使用awk合并2个表

First of all, sorry for my English and I know there's a lot of various topics regarding AWK but it's a very difficult function to me... I would like to merge two tables using common columns with awk. The tables differ in the amount of rows. I have my first table that I want to modify and the second as a reference table. I would like to compare my First of all, sorry for my English and I know t