Define Not Null column on <createTable> tag



I would be very grateful if someone can tell me how I can define a Not NULL column within a command. For example  I have the following XML to create a table which works fine :-


           <column name=“ACCOUNT_TYPE_ID” type=“NUMBER(22)”  />


But the ACCOUNT_TYPE_ID column needs to be defined as NOT NULL here.


Struggling to find a clear example on how to do this.




OK sorted it myself , solution was :-



Great ‘documentation’ guys !