Error:insert into testtable numbercolumn values('9,000.00')

Question

In testtable, ID(number(12), amount(number(12))
Now I want to insert the following record. I got error,a invalid number .
insert into testtable(id,amount) values('111','9,000.00');
I think data type is different. amount is number type but '9,000.00' is varchar2.
How can i insert '9,000.00' to number data type?
I do insert to_number('9,000.00'). It doesn't work. Would you help me for this problem.

Answer 1

Since the datatype is number, if your data is not coming from any convertable source as '9,000.00' (i.e a big auto-generated file from another system that needs data conversation), why bother when oracle will still store it in the table as 9000.
SQL> create table testtable (ID number(12), amount number(12));
Table created.
SQL> insert into testtable(id,amount) values(111,to_number('9,000.00','9,999.00'));
1 row created.
SQL> select * from testtable;
ID AMOUNT
111 9000
SQL> insert into testtable(id,amount) values(111,9000);
1 row created.
SQL> select * from testtable;
ID AMOUNT
111 9000
111 9000
SQL>