ANALYZE TABLE :TABLE_NAME DELETE STATISTICS; ANALYZE TABLE :TABLE_NAME COMPUTE STATISTICS; SELECT TABLE_NAME,GREATEST(4, CEIL(NUM_ROWS/ ((ROUND(((1958-(INI_TRANS*23))*((100-PCT_FREE)/100))/AVG_ROW_LEN)))) * 2048) TABLESIZE_KBYTES FROM USER_TABLES WHERE TABLE_NAME -- WHERE AVG_ROW_LEN > 0