oracle数据库，如何把以下三条sql合并成一条查询出来？

Question

select count(1) as flowNum from ccform_debit_all where cf_acctime > to_char(sysdate,'yyyy-MM-dd');
select count(1) as flowNumMonth from ccform_debit_all where cf_acctime > to_char(sysdate,'yyyy-MM');
select count(1) as flowNumTotal from ccform_debit_all where cf_acctime > to_char(sysdate,'yyyy');

Answer 1

select count(case when to_char(cf_acctime, 'yyyy-MM-dd') > to_char(sysdate, 'yyyy-MM-dd') then 1 end) as flowNum,
       count(case when to_char(cf_acctime, 'yyyy-MM') > to_char(sysdate, 'yyyy-MM') then 1 end)       as flowNumMonth,
       count(case when to_char(cf_acctime, 'yyyy') > to_char(sysdate, 'yyyy') then 1 end)             as flowNumTotal
from ccform_debit_all

Answer 2

就union一下？？

select count(1) as flowNum from ccform_debit_all where cf_acctime > to_char(sysdate,'yyyy-MM-dd') union all 
select count(1) as flowNumMonth from ccform_debit_all where cf_acctime > to_char(sysdate,'yyyy-MM') union all 
select count(1) as flowNumTotal from ccform_debit_all where cf_acctime > to_char(sysdate,'yyyy');