Hive How to select all but one column?

Question

Suppose my table looks something like:

Col1 Col2 Col3.....Col20 Col21

Now I want to select all but Col21. I want to change it to unix_timestamp

Answer 1

In case you want to drop multiple columns on which you are joining

select
    tb1.*,
    tb2.`(col1|col2)?+.+`
from
     tb1 left join tb2 on
    tb1.col1 = tb2.col1
    and tb1.col2 = tb2.col2