Oracle creates tables and adds default values and notes

CREATE TABLE Testemp (
ID varchar2 () default Sys_guid (),
Deptno VARCHAR2 (,--Department code)
ename varchar2 (,--name)
Sal Number (10)--payroll)

----Table Name Description
Comment on table testemp is ' test dedicated table ';
----Field Notes
Comment on column testemp.deptno is ' department code ';
Comment on column testemp.ename is ' person name ';
Comment on column testemp.sal is ' wages ';

Oracle creates tables and adds default values and notes