When exporting to CSV in Oracle SQL Developer, null values are replaced with "". I want them to be exported as the string null. Is this configurable anywhere?

Example of what is wished:

"2017-03-16 00:00:00", null

instead of:

"2017-03-16 00:00:00", ""

Exporting is performed by running a query, right-click on the data shown in the grid and select "Export..."

1 Answer 1


Just set the below in your session, as you would do in SQL*Plus:

set null "null"

Note: this will not affect how NULLs are displayed in the data grid (you can set that from the menu: Tools - Preferences - Database - Advanced - Display Null Value As), but it affects the exported CSV.

  • Learn something new every day :) +1
    – Philᵀᴹ
    Commented Mar 14, 2017 at 13:38
  • 1
    For some odd reason, I was running a 1.5.x version of Oracle SQL Developer for which 'set null "null"' returned an 'SQLPLUS Command Skipped:' error. With the latest version (4.1.5), it works flawlessly. Thank you. Commented Mar 14, 2017 at 14:53

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