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SELECT TABLESPACE_NAME,
       INITIAL_EXTENT,
       NEXT_EXTENT,
       MIN_EXTENTS,
       MAX_EXTENTS,
       PCT_INCREASE,
       MIN_EXTLEN,
       STATUS,
       CONTENTS,
       LOGGING,
       EXTENT_MANAGEMENT, -- Columns not available in v8.0.x
       ALLOCATION_TYPE, -- Remove these columns if running 
       PLUGGED_IN, -- against a v8.0.x database
       SEGMENT_SPACE_MANAGEMENT --use only in v9.2.x or later
  from DBA_TABLESPACES
 ORDER BY TABLESPACE_NAME;
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SQL code
SELECT D.TABLESPACE_NAME,
       SPACE "SUM_SPACE(M)",
       BLOCKS SUM_BLOCKS,
       SPACE - NVL(FREE_SPACE, 0) "USED_SPACE(M)",
       ROUND((1 - NVL(FREE_SPACE, 0) / SPACE) * 100, 2) "USED_RATE(%)",
       FREE_SPACE "FREE_SPACE(M)"
  from (SELECT TABLESPACE_NAME,
               ROUND(SUM(BYTES) / (1024 * 1024), 2) SPACE,
               SUM(BLOCKS) BLOCKS
       &


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