Simple way to insert data from one table

Question

Hi,
I need to know a simple way on how to transfer the data from one table to another....
First table xx_inv_tab1 has three columns col1, col2, col3 and where as second table xx_inv_tab2 has five columns col1, col2, col3, col4, col5.
Here col2, col3, col4 are the same columns as in table1 xx_inv_tab1...
Now I want to transfer first table data in to second table .... first column of second table holds a sequence, followed by the first table three columns data and followed with col4 and col5 which will hold NULL values....
In my scenario, I have 70 - 75 columns in my first table which I want to move to second table which three new columns (one is sequence and other two has null values)...
Any ideas if we make it in a simplest way rather saying insert into xx_inv_tab2 (col1, col2, col3 ............................................. col75) values (seq, col1, col2..........................col75, null, null)
Help Appreciated..
Thanks

Answer 1

Easy
untested
insert into xx_inv_tab2 t2 (col1,col2,col3,col4)
select yourSequence.nextval, t1.col1, t1.col2, t1.col3
from xx_inv_tab1 t1
;Note that col5 does not need to be used, since you want to fill it with NULL.
USe excel or sql developer to write you a list of column names, if you are to lazy to write all 75 columns by yourself.
What might also work:
untested
insert into xx_inv_tab2 t2
select yourSequence.nextval, t1.*, null
from xx_inv_tab1 t1
;Edited by: Sven W. on Aug 31, 2012 4:41 PM