[Solved]SIMPLE Question ON "CREATE TABLE as SELECT".

Question

Hi there,
I was wondering how to work it out smartly and briefly.
For example, I already have a "tableA" as following.
tableA
id name
1 name1
2 name2
create table tmp as
select id, name from tableA;
It will create the tmp table successfully.
If I want to add a new column 'tel' in tmp table,
I can run as following.
create table tmp as
select id, name, 999 tel, 'aaaaaaaaa' ps from tableA;
It will add 'tel NUMBER' column and 'ps char(9)' in tableA.
If I want to add 'col varchar(50)' in tableA,
I do not want to make a string which contains 50 characters in Select command.
How can I make it work in a smart way?
Thanks.
Phil
Message was edited by:
user615355

Answer 1

Is there a reason that you need this to be in a single statement? You would normally be better served here with a separate CREATE TABLE and INSERT (possibly as a direct path operation).
That said, you could use the CAST operator, i.e.
SCOTT @ jcave102 Local> create table a as select cast('a' as varchar2(50)) col1 from dual;
Table created.
Elapsed: 00:00:00.48
SCOTT @ jcave102 Local> desc a;
Name                                                  Null?    Type
COL1                                                           VARCHAR2(50)
SCOTT @ jcave102 Local> Justin