Teradata SQL repeat insert statement

Question

pretty new to teradata and trying to figure out how to repeat a simple insert statement.

I have the following statement

Insert into Test (Id) values ((sel max (Id)+1 from test))

And I would to repeat this 20 times.

Answer 1

For the purposes of running the statement 20 times

create table test_table_1 ( numcol int );

replace procedure test_proc()
begin
  declare rowcnt int;
  set rowcnt = 0;
while rowcnt<20 do 
begin
  insert into test_table_1 select max(coalesce(numcol,null,0))+1 from test_table_1;
  set rowcnt = rowcnt + 1;
end;  
end while;
end;

call test_proc();

select * from test_table_1;

But in reality you would simply need an identity column which would preclude the need to insert incremental value 20 times.