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SELECT tablename,sum(currentperm)/1024*1024 Bytes_usage FROM dbc.allspace WHERE databasename='your_database_name' GROUP BY 1 ORDER BY 2 DESC;
SELECT tablename,SUM(currentperm)/1024*1024 Bytes_usage FROM dbc.allspace WHERE databasename='ForgetCode' GROUP BY 1 ORDER BY 2 DESC;