问个巨难的生成时间的问题，哪位高手教一招

Question

依次为：
to_char(sysdate,'d')
to_char(sysdate,'dd')
to_char(sysdate,'ddd')
to_char(sysdate,'ww')
to_char(sysdate,'mm')
to_char(sysdate,'q')
to_char(sysdate,'yyyy')

Answer 1

try:
declare
v_dt date:=to_date('2000-01-01','yyyy-mm-dd');
i number:=1;
begin
while v_dt<to_date('2007-01-01','yyyy-mm-dd') loop
insert into tbname values(i,v_dt,
to_char(v_dt,'d'),
to_char(v_dt,'dd'),
to_char(v_dt,'ddd'),
to_char(v_dt,'ww'),
to_char(v_dt,'mm'),
to_char(v_dt,'q'),
to_char(v_dt,'yyyy')
);
i:=i+1;
v_dt:=v_dt+1;
end loop;
commit;
end;
/