Question

我有两个日期变量，我想以特定的方式呈现数据。所以，我的查询是这样显示月份名称，

    SELECT TO_CHAR (ADD_MONTHS (start_date, LEVEL - 1), 'fmMonth') months_namE
      FROM (SELECT DATE '2012-01-01' start_date, DATE '2012-03-25' end_date
              FROM DUAL)
CONNECT BY LEVEL <=
                MONTHS_BETWEEN (TRUNC (end_date, 'MM'),
                                TRUNC (start_date, 'MM'))
              * +1;

，输出就像这样，

MONTHS_NAME
-----------
January
February

我的预期输出是这样的

MONTHS_NAME | WEEK | DAYS
-------------------------
January        1      1
January        1      2 
January        1      3 
January        1      4
January        1      5
January        1      6
January        1      7   
January        2      1
January        3
January        4

我尝试了很多方法并且无法使其正常工作，请帮助我......

Answer 1

使用行生成器方法应该很容易。休息只是格式掩码。

fmMonth - 月份名称

fmDay - 日期名称

IW - 周数

D - 日期编号

在 SQL * Plus 中，我的演示介于＆＃39; 2012-01-01＆＃39; 和＆＃39; 2012-的日期之间02-20＆＃39; ：

SQL> def date_start = '2012-01-01' SQL> def date_end = '2012-02-20' SQL> SQL> WITH DATA AS 2 (SELECT to_date('&date_start', 'YYYY-MM-DD') date1, 3 to_date('&date_end', 'YYYY-MM-DD') date2 4 FROM dual 5 ) 6 SELECT TO_CHAR(date1+LEVEL-1, 'fmMonth') month_name, 7 TO_CHAR(date1+LEVEL-1, 'fmDay') day_name, 8 TO_CHAR(date1+LEVEL-1, 'IW') the_week, 9 TO_CHAR(date1+level-1, 'D') the_day 10 FROM data 11 CONNECT BY LEVEL <= date2-date1+1 12 / old 2: (SELECT to_date('&date_start', 'YYYY-MM-DD') date1, new 2: (SELECT to_date('2012-01-01', 'YYYY-MM-DD') date1, old 3: to_date('&date_end', 'YYYY-MM-DD') date2 new 3: to_date('2012-02-20', 'YYYY-MM-DD') date2

<强>结果

MONTH_NAME DAY_NAME THE_WEEK THE_DAY ---------- --------- -------- ------- January Sunday 52 1 January Monday 01 2 January Tuesday 01 3 January Wednesday 01 4 January Thursday 01 5 January Friday 01 6 January Saturday 01 7 January Sunday 01 1 January Monday 02 2 January Tuesday 02 3 January Wednesday 02 4 January Thursday 02 5 January Friday 02 6 January Saturday 02 7 January Sunday 02 1 January Monday 03 2 January Tuesday 03 3 January Wednesday 03 4 January Thursday 03 5 January Friday 03 6 January Saturday 03 7 January Sunday 03 1 January Monday 04 2 January Tuesday 04 3 January Wednesday 04 4 January Thursday 04 5 January Friday 04 6 January Saturday 04 7 January Sunday 04 1 January Monday 05 2 January Tuesday 05 3 February Wednesday 05 4 February Thursday 05 5 February Friday 05 6 February Saturday 05 7 February Sunday 05 1 February Monday 06 2 February Tuesday 06 3 February Wednesday 06 4 February Thursday 06 5 February Friday 06 6 February Saturday 06 7 February Sunday 06 1 February Monday 07 2 February Tuesday 07 3 February Wednesday 07 4 February Thursday 07 5 February Friday 07 6 February Saturday 07 7 February Sunday 07 1 February Monday 08 2 51 rows selected. SQL>

在两个日期之间生成月份名称，日期名称，周数和日期编号

1 个答案: