$ 0 0 Date wise occurrence of ORA-1555select to_char(begin_time, 'mm/dd/yyyy hh24:mi') "Int.Start",ssolderrcnt "ORA-1555s", maxquerylen "Max Query",unxpstealcnt "UNExp SCnt",UNXPBLKRELCNT "UnEXPblks", expstealcnt "Exp SCnt",EXPBLKRELCNT "ExpBlks",NOSPACEERRCNT nospace from v$undostat where ssolderrcnt>0order by begin_time;Total number of ORA-1555s since instance startupselect 'TOTAL # OF ORA-01555 SINCE INSTANCE STARTUP : '|| to_char(startup_time,'DD-MON-YY HH24:MI:SS')from v$instance;