Oracle - Error "missing left parenthesis" when CREATE TABLE

Question

I'm using Oracle SQL Developer for learning and implementing SQL Queries. But every time I try to Create Table, it gives an error and I'm not sure what's exactly I'm missing. See the image to see the error:

EDIT:

Answer 1

You can't use the comma sign after the column definition. You can use them if there are multiple columns, but not when only one column. Look the following example -

Create Table A (
i int,
j int
);

and for one column -

Create Table A (
i int
);