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 Change system date on Oracle server Tips

Oracle Database Tips by Donald BurlesonMarch 9, 2015

Question:  How can change the server date?  I know that Oracle gets the sysdate from the server data but I don't know how to change the data on my Oracle server.  I am running on Oracle Solaris.

Answer:  Each OS provides its own directions for changing the sysdate, and it would be prohibitive to display the directions for the 60+ OS server platforms supported by Oracle.

Changing the OS server date in UNIX

However, in most UNIX/Linux system you can use the date root command to change the OS sysdate.  This command is normally executed by a system administrator, not a Oracle DBA because root access is required.

Step 1. Log in as root.

Step 2. Set the time and date by entering a string like this:

root> date 0325071514

This example produces the following:

Sat March 25, 07:15 CST 2015

  • The first four digits, 0325, are the month and date, March 25th.
  • The next four digits, 0715, are the time. (Remember to use military time:  8:00 PM is 2000, 2:00 PM is 1400, etc.)
  • The final two digits, 14, are the year.

However, you can change the Oracle SYSDATE directly from SQL*Plus, if you don't want to get root access to change the data on the Oracle database server:

alter system set fixed_date ='2013-08-05';

Beware!  Changing the OS server date can cause serious issues within Oracle becaue Oracle grabs the date from the operating system.  Changing the OS date can cause serious date/time issues with Oracle auditing.

   
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