SET PAGESIZE 9999
col day format a15
SELECT A.*, Round(A.Count#*B.AVG#/1024/1024) Daily_Avg_Mb FROM(SELECT To_Char(First_Time,'YYYY-MM-DD') DAY, Count(1) Count#, Min(RECID) Min#, Max(RECID) Max# FROM gv$log_history GROUP BY To_Char(First_Time,'YYYY-MM-DD') ORDER BY 1 DESC) A,(SELECT Avg(BYTES) AVG#, Count(1) Count#, Max(BYTES) Max_Bytes, Min(BYTES) Min_Bytes FROM gv$log ) B;