Error generated while creating table in oracle

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I am writing following statement to create a table in oracle database but failed to create table. An error is generated called

ORA-00904: : invalid identifier

I had written following code to create table in oracle create table

SYSTEM.UserLogin (Online number(1) null , Role varchar2(15) null )

I am using Oracle 10g express edition.

Posted 21-Feb-12 5:11am

Awadhendra1234

Updated 21-Feb-12 5:20am

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krumia 21-Feb-12 13:17pm

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krumia · Answer 1 · 2012-02-21T07:11:00

If you Googled ORA-00904 and followed the first link, you would have seen this:

ORA-00904:	string: invalid identifier

Cause:	                The column name entered is either missing or invalid.

Action:                 Enter a valid column name. A valid column name must 
                        begin with a letter, be less than or equal to 30 
                        characters, and consist of only alphanumeric characters
                        and the special characters $, _, and #. If it 
                        contains other characters, then it must be enclosed
                        in double quotation marks. It may not be a 
                        reserved word.

If you saw the last sentence "It may not be a reserved word", then you would have Googled "Oracle reserved words", and on the first link you would have seen that both role and online are reserved words.