Answers for "check tablespace in oracle"

oracle list tablespaces

SELECT DISTINCT TABLESPACE_NAME FROM DBA_EXTENTS ORDER BY TABLESPACE_NAME;

SELECT TABLESPACE_NAME,
       sum(BYTES / 1024 / 1024) AS MB
FROM DBA_DATA_FILES GROUP BY TABLESPACE_NAME;

Tablespace ORACLE

CREATE TABLESPACE
TBS_NOME_TABLESPACE
DATAFILE 'NOME_DATAFILE.dbf' SIZE 40M ONLINE;