MySQL SELECT 查询：将 28 天添加到财务季度的最后日期

Question

我想在一个季度的最后一天加上 28 天。

我目前有以下方法来确定季度期间，然后如何将 28 天添加到该季度最后一个月的最后一天。

CASE    -- Results:  2011-Q4 (Financial Year-Qtr)
    WHEN MONTH(T5.date_purchased) BETWEEN 1  AND 3  THEN concat((YEAR(T5.date_purchased) - 1), '-', 'Q3')
    WHEN MONTH(T5.date_purchased) BETWEEN 4  AND 6  THEN concat((YEAR(T5.date_purchased) - 1), '-', 'Q4')
    WHEN MONTH(T5.date_purchased) BETWEEN 7  AND 9  THEN concat((YEAR(T5.date_purchased) - 0), '-', 'Q1')
    WHEN MONTH(T5.date_purchased) BETWEEN 10 AND 12 THEN concat((YEAR(T5.date_purchased) - 0), '-', 'Q2')
END AS FYrQtr,

我不需要考虑任何异常情况，只需在下个季度的下个月 28 号。

我尝试了以下方法，但当然会在订单日期而不是财务季度后增加 28 天。（我不需要时间）

CASE    --  Results:  2012-06-20 07:20:07  not  2012-07-28
    WHEN MONTH(T5.date_purchased) BETWEEN 1  AND 3  THEN date_add(T5.date_purchased, Interval 28 day) 
    WHEN MONTH(T5.date_purchased) BETWEEN 4  AND 6  THEN date_add(T5.date_purchased, Interval 28 day)
    WHEN MONTH(T5.date_purchased) BETWEEN 7  AND 9  THEN date_add(T5.date_purchased, Interval 28 day)
    WHEN MONTH(T5.date_purchased) BETWEEN 10  AND 12  THEN date_add(T5.date_purchased, Interval 28 day)
    END AS FRangeQtrBAS,

非常感谢。

Answer 1

从 purchasedate 中获取年份并将其与已知的季度月末日相连接：

CASE    
    WHEN MONTH(T5.date_purchased) BETWEEN 1  AND 3  THEN date_add(CONCAT(YEAR(T5.date_purchased), '-03-31'), Interval 28 day) 
    WHEN MONTH(T5.date_purchased) BETWEEN 4  AND 6  THEN date_add(CONCAT(YEAR(T5.date_purchased), '-06-30'), Interval 28 day)
    WHEN MONTH(T5.date_purchased) BETWEEN 7  AND 9  THEN date_add(CONCAT(YEAR(T5.date_purchased), '-09-30'), Interval 28 day)
    WHEN MONTH(T5.date_purchased) BETWEEN 10  AND 12  THEN date_add(CONCAT(YEAR(T5.date_purchased), '-12-31'), Interval 28 day)
END AS FRangeQtrBAS

MySQL SELECT 查询：将 28 天添加到财务季度的最后日期

MySQL SELECT Query: Add 28 days to the last date of a financial quarter

mysql

select

case