undcemcs02> sqlplus C##user_id/password@xe 

 SQL*Plus: Release 23.0.0.0.0 - Production on Sat Aug 10 12:45:44 2024
 Version 23.4.0.24.05

 Copyright (c) 1982, 2024, Oracle.  All rights reserved.
 Last Successful login time: Fri Aug 09 2024 22:49:56 -05:00

 Connected to:
 Oracle Database 21c Express Edition Release 21.0.0.0.0 - Production
 Version 21.3.0.0.0

 SQL> create table  Students ( 
   2    Name     varchar(32)  not null, 
   3    City     varchar(16)  not null, 
   4    Country  varchar(16)  not null ); 

 Table created.

 SQL> desc Students; 

  Name                             Null?     Type
  -------------------------------  --------  -----------------------
  NAME                             NOT NULL  VARCHAR2(32)
  CITY                             NOT NULL  VARCHAR2(16)
  COUNTRY                          NOT NULL  VARCHAR2(16)


 SQL> insert into Students values ( 'Alfreds Futterkiste', 
   2>   'Berlin', 'Germany' ); 
 1 row created.

 SQL> insert into Students values ( 
   2>   'Berglunds snabbköp', 'Luleå', 'Sweden' ); 
 1 row created.

 SQL> insert into Students values ( 
   2>   'Centro comercial Moctezuma', 'México D.F.', 'Mexico' ); 
 1 row created.

 SQL> insert into Students values ( 
   2>   'Ernst Handel', 'Graz', 'Austria' ); 
 1 row created.

 SQL> insert into Students values ( 
   2>   'Island Trading', 'Cowes', 'UK' ); 
 1 row created.

 ...


 SQL> select * from Students; 

 NAME                             CITY           COUNTRY
 -------------------------------- -------------- ----------------
 Alfreds Futterkiste              Berlin         Germany 
 Berglunds snabbköp               Luleå          Sweden  
 Centro comercial Moctezuma       México D.F.    Mexico  
 Ernst Handel                     Graz           Austria 
 FISSA Fabrica Inter. Salchichas  Madrid         Spain   
 Galería del gastrónomo           Barcelona      Spain   
 Island Trading                   Cowes          UK      
 Königlich Essen                  Brandenburg    Germany 
 Laughing Bacchus Wine Cellars    Vancouver      Canada  
 Magazzini Alimentari Riuniti     Bergamo        Italy   
 North/South                      London         UK      
 Paris spécialités                Paris          France  
 Rattlesnake Canyon Grocery       Albuquerque    USA     
 Simons bistro                    København      Denmark 
 The Big Cheese                   Portland       USA     
 Vaffeljernet                     Arhus          Denmark 
 Wolski Zajazd                    Warszawa       Poland  

 17 rows selected.

 SQL> commit; 
 SQL> exit; 
 Disconnected from Oracle Database 21c Express Edition Release 21.0.0.0.0
    - Production
 Version 21.3.0.0.0

 undcemcs02>