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sql - 带有美国假期的日期列表加上从上周六开始的每一天

问题描述

我想创建一个从今天前三年的 1 月 1 日到未来 2 年的 12 月 31 日的日期列表。在第二列中，我想标记圣诞节 (XMAS)、新年前夜 (NYE)、元旦 (NYD)、阵亡将士纪念日 (MEM)、7 月 4 日 (JUL4)、劳动节 (LABOR)。对于后三个假期，我不仅需要标注假期日期，还要标注上周六的每一天，以便标注整个长周末。否则用工作日名称标记日期。

    SELECT STAYDATE, 
    CASE 
    WHEN TO_CHAR(STAYDATE,'MM')=12 AND TO_CHAR(STAYDATE,'DD')=25 THEN 'XMAS' 
    WHEN TO_CHAR(STAYDATE,'MM')=12 AND TO_CHAR(STAYDATE,'DD')=31 THEN 'NYE'
    WHEN TO_CHAR(STAYDATE,'MM')=01 AND TO_CHAR(STAYDATE,'DD')=01 THEN 'NYD'
    WHEN TO_CHAR(STAYDATE,'MM')=7 AND TO_CHAR(STAYDATE,'DD')=04 THEN 'JUL4'
    ELSE
    TO_CHAR(STAYDATE,'dy') END DAYLABEL
    FROM (
    SELECT TRUNC (add_months(sysdate,24) - ROWNUM) STAYDATE
    FROM DUAL CONNECT BY ROWNUM < 1000)

标签： sqloracledate

解决方案

SQL小提琴

查询 1：

SELECT DT,
       CASE
       WHEN     EXTRACT( MONTH FROM DT ) = 12
            AND EXTRACT( DAY   FROM DT ) = 25
       THEN 'XMAS'
       WHEN     EXTRACT( MONTH FROM DT ) = 12
            AND EXTRACT( DAY   FROM DT ) = 31
       THEN 'NYE'
       WHEN     EXTRACT( MONTH FROM DT ) =  1
            AND EXTRACT( DAY   FROM DT ) =  1
       THEN 'NYD'
       WHEN     EXTRACT( MONTH FROM DT ) =  7
            AND DT BETWEEN NEXT_DAY( TRUNC( DT, 'MM' ) - 4, 'SATURDAY' )
                   AND     TRUNC( DT, 'MM' ) + 3
       THEN 'JUL4'
       WHEN     EXTRACT( MONTH FROM DT ) =  9
            AND DT BETWEEN NEXT_DAY( TRUNC( DT, 'MM' ) - 1, 'MONDAY' ) - 2
                   AND     NEXT_DAY( TRUNC( DT, 'MM' ) - 1, 'MONDAY' )
       THEN 'LABOR'
       WHEN     EXTRACT( MONTH FROM DT ) =  5
            AND DT BETWEEN NEXT_DAY( TRUNC( LAST_DAY( DT ) ) - 7, 'MONDAY' ) - 2
                   AND     NEXT_DAY( TRUNC( LAST_DAY( DT ) ) - 7, 'MONDAY' )
       THEN 'MEM'
       ELSE TO_CHAR( DT, 'DY' )
       END AS day
FROM   (
  SELECT ADD_MONTHS( TRUNC( SYSDATE, 'YYYY' ), -36 ) + LEVEL - 1 AS DT
  FROM   DUAL
  CONNECT BY
         ADD_MONTHS( TRUNC( SYSDATE, 'YYYY' ), -36 ) + LEVEL - 1
           <  ADD_MONTHS( TRUNC( SYSDATE, 'YYYY' ), +24 )
)

结果：

|                   DT |   DAY |
|----------------------|-------|
| 2015-01-01T00:00:00Z |   NYD |
| 2015-01-02T00:00:00Z |   FRI |
| 2015-01-03T00:00:00Z |   SAT |
| 2015-01-04T00:00:00Z |   SUN |
| 2015-01-05T00:00:00Z |   MON |
| 2015-01-06T00:00:00Z |   TUE |
| 2015-01-07T00:00:00Z |   WED |
| 2015-01-08T00:00:00Z |   THU |
| 2015-01-09T00:00:00Z |   FRI |
| 2015-01-10T00:00:00Z |   SAT |
| 2015-01-11T00:00:00Z |   SUN |
| 2015-01-12T00:00:00Z |   MON |
...
| 2015-05-21T00:00:00Z |   THU |
| 2015-05-22T00:00:00Z |   FRI |
| 2015-05-23T00:00:00Z |   MEM |
| 2015-05-24T00:00:00Z |   MEM |
| 2015-05-25T00:00:00Z |   MEM |
| 2015-05-26T00:00:00Z |   TUE |
| 2015-05-27T00:00:00Z |   WED |
...
| 2015-07-02T00:00:00Z |   THU |
| 2015-07-03T00:00:00Z |   FRI |
| 2015-07-04T00:00:00Z |  JUL4 |
| 2015-07-05T00:00:00Z |   SUN |
| 2015-07-06T00:00:00Z |   MON |
...
| 2015-09-03T00:00:00Z |   THU |
| 2015-09-04T00:00:00Z |   FRI |
| 2015-09-05T00:00:00Z | LABOR |
| 2015-09-06T00:00:00Z | LABOR |
| 2015-09-07T00:00:00Z | LABOR |
| 2015-09-08T00:00:00Z |   TUE |
| 2015-09-09T00:00:00Z |   WED |
...
| 2015-12-23T00:00:00Z |   WED |
| 2015-12-24T00:00:00Z |   THU |
| 2015-12-25T00:00:00Z |  XMAS |
| 2015-12-26T00:00:00Z |   SAT |
| 2015-12-27T00:00:00Z |   SUN |
| 2015-12-28T00:00:00Z |   MON |
| 2015-12-29T00:00:00Z |   TUE |
| 2015-12-30T00:00:00Z |   WED |
| 2015-12-31T00:00:00Z |   NYE |
| 2016-01-01T00:00:00Z |   NYD |
| 2016-01-02T00:00:00Z |   SAT |
| 2016-01-03T00:00:00Z |   SUN |
...
| 2016-05-26T00:00:00Z |   THU |
| 2016-05-27T00:00:00Z |   FRI |
| 2016-05-28T00:00:00Z |   MEM |
| 2016-05-29T00:00:00Z |   MEM |
| 2016-05-30T00:00:00Z |   MEM |
| 2016-05-31T00:00:00Z |   TUE |
| 2016-06-01T00:00:00Z |   WED |
...
| 2016-06-30T00:00:00Z |   THU |
| 2016-07-01T00:00:00Z |   FRI |
| 2016-07-02T00:00:00Z |  JUL4 |
| 2016-07-03T00:00:00Z |  JUL4 |
| 2016-07-04T00:00:00Z |  JUL4 |
| 2016-07-05T00:00:00Z |   TUE |
| 2016-07-06T00:00:00Z |   WED |
...
| 2016-09-01T00:00:00Z |   THU |
| 2016-09-02T00:00:00Z |   FRI |
| 2016-09-03T00:00:00Z | LABOR |
| 2016-09-04T00:00:00Z | LABOR |
| 2016-09-05T00:00:00Z | LABOR |
| 2016-09-06T00:00:00Z |   TUE |
| 2016-09-07T00:00:00Z |   WED |
...
| 2016-12-23T00:00:00Z |   FRI |
| 2016-12-24T00:00:00Z |   SAT |
| 2016-12-25T00:00:00Z |  XMAS |
| 2016-12-26T00:00:00Z |   MON |
| 2016-12-27T00:00:00Z |   TUE |
| 2016-12-28T00:00:00Z |   WED |
| 2016-12-29T00:00:00Z |   THU |
| 2016-12-30T00:00:00Z |   FRI |
| 2016-12-31T00:00:00Z |   NYE |
| 2017-01-01T00:00:00Z |   NYD |
| 2017-01-02T00:00:00Z |   MON |
| 2017-01-03T00:00:00Z |   TUE |
...
| 2017-05-25T00:00:00Z |   THU |
| 2017-05-26T00:00:00Z |   FRI |
| 2017-05-27T00:00:00Z |   MEM |
| 2017-05-28T00:00:00Z |   MEM |
| 2017-05-29T00:00:00Z |   MEM |
| 2017-05-30T00:00:00Z |   TUE |
| 2017-05-31T00:00:00Z |   WED |
...
and so on...
...
| 2019-12-23T00:00:00Z |   MON |
| 2019-12-24T00:00:00Z |   TUE |
| 2019-12-25T00:00:00Z |  XMAS |
| 2019-12-26T00:00:00Z |   THU |
| 2019-12-27T00:00:00Z |   FRI |
| 2019-12-28T00:00:00Z |   SAT |
| 2019-12-29T00:00:00Z |   SUN |
| 2019-12-30T00:00:00Z |   MON |
| 2019-12-31T00:00:00Z |   NYE |

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