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Asked: 2024-09-26T16:35:10+05:30 In:

how to set date format in oracle sql developer

I’m currently working on a project using Oracle SQL Developer, and I’ve encountered an issue with the date format that’s causing me some frustration. When I query my database, the date fields are being displayed in a format that is not what I prefer, making it difficult to read and interpret the results correctly.

For instance, the dates are showing up in the default format, which is something like ‘DD-MON-YY’, while I really want them to display in ‘YYYY-MM-DD’ format for consistency with the formats used in other applications I’m working with. I’ve looked through the preferences in SQL Developer but I can’t seem to find the right settings to change this format.

Additionally, I want to make sure that any queries I run also reflect this format when retrieving data. Is there a straightforward way to set the default date format for my session? Or do I need to implement a format change in every single query? Any guidance or step-by-step instructions on how to resolve this would be greatly appreciated, as I need to streamline my data presentation for better usability. Thank you!

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    2 Answers

    1. How to Set Date Format in Oracle SQL Developer

      Okay, so if you wanna mess around with dates in Oracle SQL Developer, here’s what you gotta do:

      1. First, open your Oracle SQL Developer thingy.
      2. Look at the top for some options and find Tools.
      3. Click on Preferences from the dropdown menu.
      4. A new window pops up, and here’s where the magic starts.
      5. On the left side, scroll down and find Database, then click on it.
      6. Then, find and select NLS.
      7. Now on the right, you’ll see some settings. Look for the Date Format field.
      8. You can type in your desired date format. Some popular ones are:
        • DD-MON-YYYY (like 25-JAN-2023)
        • YYYY-MM-DD (like 2023-01-25)
        • MM/DD/YYYY (like 01/25/2023)
      9. Type in the one that makes your heart sing!
      10. After that, just hit the OK button.

      And voila! You should now see dates in the format you picked when you run your queries. Super easy, right?

      Have fun coding!


    2. To set the date format in Oracle SQL Developer for an experienced programmer, you can modify the NLS settings to reflect your desired date format. This is accomplished by navigating to the Preferences panel. Go to the “Tools” menu and select “Preferences.” In the Preferences dialog, expand the “Database” section and click on “NLS.” Here, you can set the “Date Format” parameter to your preferred format, such as ‘DD-MON-YYYY’ or ‘YYYY-MM-DD’. Once you have input your custom format, make sure to click “OK” to apply the changes. This will establish the format for all sessions initiated from SQL Developer.

      It is also important to note that SQL Developer may inherit the database’s NLS settings, which can vary from the client-side configurations. To ensure that your session uses the specified date format regardless of the database settings, you can execute an explicit NLS_DATE_FORMAT session command. Enter the command `ALTER SESSION SET NLS_DATE_FORMAT = ‘YOUR_FORMAT’;` following your custom format in the SQL Worksheet. This command will dynamically modify the date format for that specific session without altering global database settings.

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