CREATE TABLESPACE ses
   DATAFILE '/opt/oracle/product/21c/dbhomeXE/dbs/ses.dbf' SIZE 90M
   AUTOEXTEND ON;

   CREATE TABLESPACE sesi
   DATAFILE '/opt/oracle/product/21c/dbhomeXE/dbs/sesi.dbf' SIZE 90M
   AUTOEXTEND ON;

   CREATE TABLESPACE sestrab
   DATAFILE '/opt/oracle/product/21c/dbhomeXE/dbs/sestrab.dbf' SIZE 90M
   AUTOEXTEND ON ;