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Number of Tables by The Number of Rows in Oracle Database

Here I am giving an example to find out number of tables by the number of rows in oracle database.

Query 1: Number of all tables accessible to the current user in Oracle database by the number of rows grouped into predefined intervals.

SELECT row_interval,
       count(*) AS no_of_tables
  FROM (SELECT owner,
               table_name,
               num_rows,
               CASE
                 WHEN num_rows > 1000000000
                 THEN '1b rows and more'
                 WHEN num_rows > 1000000
                 THEN '1m - 1b rows'
                 WHEN num_rows > 1000
                 THEN '1k - 1m rows'
                 WHEN num_rows > 100
                 THEN '100 - 1k rows'
                 WHEN num_rows > 10
                 THEN '10 - 100 rows'
                 ELSE '0 - 10 rows'
               END AS row_interval
          FROM sys.all_tables
-- excluding some Oracle maintained schemas
         WHERE owner NOT IN ('ANONYMOUS','CTXSYS','DBSNMP','EXFSYS', 
                             'LBACSYS', 'MDSYS', 'MGMT_VIEW','OLAPSYS',
                             'OWBSYS','ORDPLUGINS', 'ORDSYS', 'SI_INFORMTN_SCHEMA',
                             'SYS','SYSMAN','SYSTEM', 'TSMSYS','DIP', 
                             'WKPROXY','WMSYS','XDB','APEX_040000', 
                             'APEX_PUBLIC_USER', 'FLOWS_30000','FLOWS_FILES',
                             'MDDATA', 'ORACLE_OCM', 'XS$NULL', 'SPATIAL_CSW_ADMIN_USR', 
                             'SPATIAL_WFS_ADMIN_USR', 'PUBLIC', 'WK_TEST','WKSYS', 
                             'OUTLN')
       )
 GROUP BY row_interval
 ORDER BY row_interval;

Query 2: Number of all tables in Oracle database by the number of  rows grouped into predefined intervals. (If you have privilege on dba_tables)

SELECT row_interval,
       count(*) AS no_of_tables
  FROM (SELECT owner,
               table_name,
               num_rows,
               CASE
                 WHEN num_rows > 1000000000
                 THEN '1b rows and more'
                 WHEN num_rows > 1000000
                 THEN '1m - 1b rows'
                 WHEN num_rows > 1000
                 THEN '1k - 1m rows'
                 WHEN num_rows > 100
                 THEN '100 - 1k rows'
                 WHEN num_rows > 10
                 THEN '10 - 100 rows'
                 ELSE '0 - 10 rows'
               END AS row_interval
          FROM sys.dba_tables
-- excluding some Oracle maintained schemas
         WHERE owner NOT IN ('ANONYMOUS','CTXSYS','DBSNMP','EXFSYS', 
                             'LBACSYS', 'MDSYS', 'MGMT_VIEW','OLAPSYS',
                             'OWBSYS','ORDPLUGINS', 'ORDSYS', 'SI_INFORMTN_SCHEMA',
                             'SYS','SYSMAN','SYSTEM', 'TSMSYS','DIP', 
                             'WKPROXY','WMSYS','XDB','APEX_040000', 
                             'APEX_PUBLIC_USER', 'FLOWS_30000','FLOWS_FILES',
                             'MDDATA', 'ORACLE_OCM', 'XS$NULL', 'SPATIAL_CSW_ADMIN_USR', 
                             'SPATIAL_WFS_ADMIN_USR', 'PUBLIC', 'WK_TEST','WKSYS', 
                             'OUTLN')
       )
 GROUP BY row_interval
 ORDER BY row_interval;

Output:

Reference:

Happy APEXing!!!...

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