sql - 使用oracle sql列出所有月份

Question

伙计们，有没有更好的方法来列出除此之外的所有月份:

select to_char(add_months(to_date('01/01/1000', 'DD/MM/RRRR'), ind.l-1), 'MONTH') as month_descr,
       ind.l as month_ind
  from dual descr,
       (select l
          from (select level l 
                  from dual 
                connect by level <= 12
               )
       ) ind
order by 2;

回答:

SELECT to_char(add_months(SYSDATE, (LEVEL-1 )),'MONTH') as months 
  FROM dual 
CONNECT BY LEVEL <= 1

还有一个问题见下文

另外我想列出前两年，包括今年。我写了这个 sql 查询。让我知道是否有更好的东西。

select extract(year from sysdate) - (level-1) as years 
  from dual 
connect by level <=3 
order by years

Answer 1

不是更好，而是更干净一点:

SQL>  select to_char(date '2000-12-01' + numtoyminterval(level,'month'),'MONTH') as month
  2     from dual
  3  connect by level <= 12
  4  /

MONTH
---------
JANUARY
FEBRUARY
MARCH
APRIL
MAY
JUNE
JULY
AUGUST
SEPTEMBER
OCTOBER
NOVEMBER
DECEMBER

12 rows selected.

问候，
抢。