任何机构都可以建议如何将以下 4 个更新语句变为单个更新语句吗?
update dbo.FACOD set LowValue ='07/02/2010' where Fieldname in ('AYStartDate','Dateloanstart')and AwardYear='2012-13'
update dbo.FACOD set LowValue ='07/02/2011' where Fieldname in ('AYStartDate','Dateloanstart')and AwardYear='2013-14'
update dbo.FACOD set HighValue='06/30/2015' where Fieldname in ('AYEndDate','DateloanEnd')and AwardYear='2012-13'
update dbo.FACOD set HighValue='06/30/2016' where Fieldname in ('AYEndDate','DateloanEnd')and AwardYear='2013-14'
尝试过以下一个
UPDATE dbo.FACOD
SET LowValue = CASE WHEN Fieldname in ('AYStartDate','Dateloanstart')and AwardYear='2012-13' THEN '07/02/2010' ELSE LowValue END,
HighValue = CASE WHEN Fieldname in ('AYEndDate','DateloanEnd')and AwardYear='2012-13'THEN '06/30/2015'ELSE HighValue END,
但它并不能满足所有更新语句。
最佳答案
请尝试:
update
dbo.FACOD
set
LowValue=(case when Fieldname in ('AYStartDate','Dateloanstart')and AwardYear='2012-13' then '07/02/2010'
when Fieldname in ('AYStartDate','Dateloanstart')and AwardYear='2013-14' then '07/02/2011'
else LowValue end),
HighValue=(case when Fieldname in ('AYEndDate','DateloanEnd')and AwardYear='2012-13' then '06/30/2015'
when Fieldname in ('AYEndDate','DateloanEnd')and AwardYear='2013-14' then '06/30/2016'
else HighValue end)
where
Fieldname in ('AYStartDate', 'Dateloanstart', 'AYEndDate', 'DateloanEnd')and
AwardYear IN ('2012-13', '2013-14')
关于sql - 与单个更新语句组合的更新查询,我们在Stack Overflow上找到一个类似的问题: https://stackoverflow.com/questions/18565843/