Question

Today in interview, I was asked, if I can write a single query to copy data from 3 tables to an empty table.

I started saying, I will use temp table or table variables but he said no, he wants to see in a single statement or query…. I was blank 🙁

Do any of you can share the right answer please 🙂

Answer 1

insert into <emplty_table>
select * from table1
union all
select * from table2
union all
select * from table3

provided all the table have the same structure