how to set table size in oracle code example

Example 1: alter table column size oracle

ALTER TABLE tablename MODIFY fieldname VARCHAR2(100);

Example 2: oracle table size

SELECT e.OWNER, e.SEGMENT_NAME, e.TABLESPACE_NAME, sum(e.bytes) / 1048576 AS Megs
FROM dba_extents e
WHERE
  e.OWNER = 'SCHEME_NAME' AND
  e.TABLESPACE_NAME = 'TBS_NAME' AND
  e.SEGMENT_NAME IN ('TABLE_NAME')
GROUP BY e.OWNER, e.SEGMENT_NAME, e.TABLESPACE_NAME
ORDER BY e.TABLESPACE_NAME, e.SEGMENT_NAME;

Example 3: oracle change tablespace size

ALTER TABLESPACE tablespace_name
    ADD DATAFILE 'path_to_datafile'
    SIZE size
    AUTOEXTEND ON;
Code language: SQL (Structured Query Language) (sql)

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