需要使用SYS用户登录查看

/* Formatted on 2020/12/30 上午 11:17:12 (QP5 v5.163.1008.3004) */
SELECT k.inst_id "INST_ID",
       ktssoses "SADDR",
       sid,
       ktssosno "SERIAL#",
       username "USERNAME",
       osuser "OSUSER",
       ktssosqlid "SQL_ID",
       ktssotsn "TABLESPACE",
       DECODE (ktssocnt,  0, 'PERMANENT',  1, 'TEMPORARY') "CONTENTS",
       --注意在12c的v$sort_usage定义中TABLESPACE和CONTENTS已经发生变化了。
       DECODE (ktssosegt,
               1, 'SORT',
               2, 'HASH',
               3, 'DATA',
               4, 'INDEX',
               5, 'LOB_DATA',
               6, 'LOB_INDEX',
               'UNDEFINED')
          "SEGTYPE",
       ktssofno "SEGFILE#",
       ktssobno "SEGBLK#",
       ktssoexts "EXTENTS",
       ktssoblks "BLOCKS",
       ROUND (ktssoblks * p.VALUE / 1024 / 1024, 2) "SIZE_MB",
       ktssorfno "SEGRFNO#"
  FROM x$ktsso k,
       v$session s,
       (SELECT VALUE
          FROM v$parameter
         WHERE name = 'db_block_size') p
 WHERE ktssoses = s.saddr AND ktssosno = s.serial#;```sql