How to Find SCN from Timestamp and Vice Versa in Oracle

How to Find SCN from Timestamp in Oracle

SQL> Col scn for 999999999
SQL> select timestamp_to_scn(to_timestamp('27-12-2018 15:20:00','DD-MM-YYYY HH24:MI:SS')) as scn from dual;
SCN
———-
845396

How to Find Timestamp from SCN in Oracle

SQL> alter session set nls_date_format='DD-MON-RRRR HH24:MI:SS';
SQL> select scn_to_timestamp(845396) as timestamp from dual;
TIMESTAMP
—————————————————————————
27-12-2018 15:20:02

How to Find the Current SCN in Oracle Using DBMS_FLASHBACK

SQL> select DBMS_FLASHBACK.GET_SYSTEM_CHANGE_NUMBER from dual;
GET_SYSTEM_CHANGE_NUMBER
————————
845401

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