Find out the history of SQL queries
select v.SQL_TEXT, v.PARSING_SCHEMA_NAME, v.FIRST_LOAD_TIME, v.DISK_READS, v.ROWS_PROCESSED, v.ELAPSED_TIME, v.service from v$sql vwhere to_date(v.FIRST_LOAD_TIME,'YYYY-MM-DD hh24:mi:ss')>ADD_MONTHS(trunc(sysdate,'MM'),-2)where clause is optional. You can sort the results according to FIRST_LOAD_TIME and find the records up to 2 months ago.
For recent SQL:
select * from v$sqlFor history:
select * from dba_hist_sqltext
You can use this sql statement to get the history for any date:
SELECT * FROM V$SQL V where to_date(v.FIRST_LOAD_TIME,'YYYY-MM-DD hh24:mi:ss') > sysdate - 60