Question

我有一个脚本，我想通过一些日期相应地从db中提取值。

我有一个返回日期的函数，这个日期可以是currentDate - 1个月，或者可以是curentDate -2个月。功能是

set @syssDate = DATEADD(month, -1, @syss_date);

我宣布了一个开始日期：

declare @start_quarter datetime
set @start_quarter = '2015-07-01';

我想在WHERE子句中添加

case
   when syssDate = start_quarter 
      then bu.date between '2015-01-01' and '2015-10-01'
       else   -- another date

我的查询如下：

    declare @start_quarter datetime
    set @start_quarter = '2015-01-01';

    declare @actual_Date datetime
    set @actual_Date = DATEADD(month, -1, @rollover_date);


        select sum(t.Revenue) as  Revenue  from (
             select sum(bu.value) as Revenue
                  from bus_category_for bu
                      join bus_category buc on buc.id=bu.bus_category_id
                      join bus bu on  bu.id=buc.bus_id
                   where buc.type_id=18 and bu.id=21 and 
--Here I want to add a case statement
bu.date between '2015-01-01' and '2015-10-01'

Answer 1

我猜你需要这样的东西

SELECT Sum(t.Revenue) AS Revenue
FROM   (SELECT Sum(bu.value) AS Revenue
        FROM   bus_category_for bu
               JOIN bus_category buc
                 ON buc.id = bu.bus_category_id
               JOIN bus bu
                 ON bu.id = buc.bus_id
        WHERE  buc.type_id = 18
               AND bu.id = 21
               AND ( ( @syssDate = @start_quarter
                       AND bu.date BETWEEN '2015-01-01' AND '2015-10-01' )
                      OR ( another date ) ))a

Answer 2

尝试类似

的内容

WHERE   (syssDate = start_quarter AND bu.date between '2015-01-01' and '2015-10-01')
    OR   (yssDate <> start_quarter AND bu.date between '2016-01-01' and '2016-10-01')

通常，建议不要将between用于日期。最好使用bu.date >= '2015-01-01' AND bu.date < '2015-10-02'。请参阅here。

SQL Server：WHERE子句之间的情况

2 个答案: