As Of Timestamp Oracle. Since oracle 9i release 2, you can use as of scn | timestamp flashback query to query the before data of a changed table. Clients as a consultant, insource or outsource.i.
Table doesn't exists issue with oracle stored procedure. The difference between these two functions is that the localtimestamp function returns a timestamp value while the current_timestamp function returns a timestamp with time zone value. The to_timestamp function is supported in the various versions of the oracle/plsql, including, oracle 12c, oracle 11g, oracle 10g and oracle 9i.