1? WITH
1.1? RECURSIVE
1.2+ ,
1.2 common-table-expression
2 fullselect
3? 
3 order-by-clause
4? 
4 fetch-first-clause
5+ 
5? 
5 update-clause
5 read-only-clause
5 optimize-clause
5 isolation-clause
6 (1) (2)