SQL> SELECT *
2 FROM (SELECT segment_name, segment_type, BYTES / 1024 / 1024
3 FROM dba_segments
4 WHERE tablespace_name = 'SYSTEM'
5 ORDER BY 3 DESC)
6 WHERE ROWNUM < 11;
SEGMENT_NAME SEGMENT_TYPE BYTES/1024/1024
-------------------- ------------------ ---------------
SOURCE$ TABLE 1729,70313
IDL_UB1$ TABLE 895,445313
I_SOURCE1 INDEX 555,484375
IDL_UB2$ TABLE 483,648438
ARGUMENT$ TABLE 473,335938
I_ARGUMENT1 INDEX 194,914063
I_ARGUMENT2 INDEX 120,015625
C_OBJ# CLUSTER 88,046875
IDL_SB4$ TABLE 82,984375
I_COL1 INDEX 63,3125
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