The following columns are returned in the below query:
- Owner schema.
- Object name and type (TABLE, INDEX, etc.).
- Name of the table this object is associated with. For E.g. indexes are associated with their parent tables.
- Database space is occupied by the object in megabytes.
- Tablespace where an object is stored.
- The number of extents allocated for the object.
- Size of the initial extent in bytes.
- Total database size occupied by the parent table. E.g. for indexes, it will be the size of the parent * table plus the sizes of all the indexes on that table.
SELECT * FROM (
SELECT
owner, object_name, object_type, table_name, ROUND(bytes)/1024/1024 AS MB,
tablespace_name, extents, initial_extent,
ROUND(Sum(bytes/1024/1024) OVER (PARTITION BY table_name)) AS total_table_MB
FROM (
SELECT owner, segment_name AS object_name, 'TABLE' AS object_type,
segment_name AS table_name, bytes,
tablespace_name, extents, initial_extent
FROM dba_segments
WHERE segment_type IN ('TABLE', 'TABLE PARTITION', 'TABLE SUBPARTITION')
UNION ALL
SELECT i.owner, i.index_name AS object_name, 'INDEX' AS object_type,
i.table_name, s.bytes,
s.tablespace_name, s.extents, s.initial_extent
FROM dba_indexes i, dba_segments s
WHERE s.segment_name = i.index_name
AND s.owner = i.owner
AND s.segment_type IN ('INDEX', 'INDEX PARTITION', 'INDEX SUBPARTITION')
UNION ALL
SELECT l.owner, l.column_name AS object_name, 'LOB_COLUMN' AS object_type,
l.table_name, s.bytes,
s.tablespace_name, s.extents, s.initial_extent
FROM dba_lobs l, dba_segments s
WHERE s.segment_name = l.segment_name
AND s.owner = l.owner
AND s.segment_type = 'LOBSEGMENT'
UNION ALL
SELECT l.owner, l.column_name AS object_name, 'LOB_INDEX' AS object_type,
l.table_name, s.bytes,
s.tablespace_name, s.extents, s.initial_extent
FROM dba_lobs l, dba_segments s
WHERE s.segment_name = l.index_name
AND s.owner = l.owner
AND s.segment_type = 'LOBINDEX'
)
WHERE owner in UPPER('&TABLE_NAME')
)
WHERE total_table_MB > 10
ORDER BY total_table_MB DESC, MB DESC
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