select * from all_tables where owner = 'TEST';

select * from all_tables where owner = 'TEST' and table_name like '%S%';

select * from user_tables;

select * from tabs;

select * from user_tables where table_name like '%S%';

select * from all_tab_comments;

select * from user_tab_comments;

select * from all_col_comments;

select * from user_col_comments;

select * from all_tab_columns;

select * from user_tab_columns;

SELECT *
  FROM (SELECT T1.OWNER,
               T1.TABLE_NAME,
               ROUND(T1.TABLE_SIZE / 1024 / 1024) +
               ROUND(NVL(T3.LOB_DATA_SIZE, 0) / 1024 / 1024) TABLE_SIZE_MB,
               ROUND(NVL(T2.INDEX_SIZE, 0) / 1024 / 1024) +
               ROUND(NVL(T3.LOB_INDEX_SIZE, 0) / 1024 / 1024) INDEX_SIZE_MB,
               ROUND(T1.TABLE_SIZE / 1024 / 1024) +
               ROUND(NVL(T3.LOB_DATA_SIZE, 0) / 1024 / 1024) +
               ROUND(NVL(T2.INDEX_SIZE, 0) / 1024 / 1024) +
               ROUND(NVL(T3.LOB_INDEX_SIZE, 0) / 1024 / 1024 / 1024) SIZE_MB
          FROM (SELECT OWNER,
                       SEGMENT_NAME TABLE_NAME,
                       ROUND(SUM(BYTES)) TABLE_SIZE
                  FROM DBA_SEGMENTS
                 WHERE SEGMENT_TYPE LIKE 'TABLE%'
                 GROUP BY OWNER, SEGMENT_NAME) T1,
               (SELECT A.OWNER, A.TABLE_NAME, SUM(B.BYTES) INDEX_SIZE
                  FROM (SELECT OWNER, TABLE_NAME, INDEX_NAME
                          FROM DBA_INDEXES
                         WHERE INDEX_TYPE <> 'LOB') A,
                       (SELECT OWNER, SEGMENT_NAME, BYTES FROM DBA_SEGMENTS) B
                 WHERE A.OWNER = B.OWNER
                   AND A.INDEX_NAME = B.SEGMENT_NAME
                 GROUP BY A.OWNER, A.TABLE_NAME) T2,
               (SELECT A.OWNER,
                       A.TABLE_NAME,
                       SUM(B.LOB_DATA_SIZE) LOB_DATA_SIZE,
                       SUM(C.LOB_INDEX_SIZE) LOB_INDEX_SIZE
                  FROM (SELECT OWNER, TABLE_NAME, SEGMENT_NAME, INDEX_NAME
                          FROM DBA_LOBS) A,
                       (SELECT OWNER, SEGMENT_NAME, SUM(BYTES) LOB_DATA_SIZE
                          FROM DBA_SEGMENTS
                         GROUP BY OWNER, SEGMENT_NAME) B,
                       (SELECT OWNER, SEGMENT_NAME, SUM(BYTES) LOB_INDEX_SIZE
                          FROM DBA_SEGMENTS
                         GROUP BY OWNER, SEGMENT_NAME) C
                 WHERE A.OWNER = B.OWNER
                   AND A.SEGMENT_NAME = B.SEGMENT_NAME
                   AND A.OWNER = C.OWNER
                   AND A.INDEX_NAME = C.SEGMENT_NAME
                 GROUP BY A.OWNER, A.TABLE_NAME) T3
         WHERE T1.OWNER = T2.OWNER(+)
           AND T1.TABLE_NAME = T2.TABLE_NAME(+)
           AND T1.OWNER = T3.OWNER(+)
           AND T1.TABLE_NAME = T3.TABLE_NAME(+)
           AND T1.OWNER = UPPER('TEST')
         ORDER BY 5 DESC) X;