how to set the data format for date column sql developer
up vote 145 down vote accepted. You can change this in preferences: 1  From Oracle SQL Developer's menu go to: Tools Preferences. 2  From the Preferences dialog, select Database NLS from the left panel. 3  From the list of NLS parameters, enter DD-MON-RR HH24:MI:SS into the Date Format field.4  Save and close the dialog, done!ith Oracle SQL Developer 3.2.20.09, i managed to set the custom format for the type DATE this way : YYYY-MM-DD HH24:MI:SS. Note that the following format does not worked for me : DD-MON-RR HH24:MI:SS. As a result, it keeps the default format, without any error.