我正在编写一个带有两个Case When语句的查询,第二个使用第一个的状态来确定该值。但是,我在第二个语句中收到无效的列错误。有谁知道解决这个问题的简单解决方案?谢谢!
select
a.ID
,ss.Date
,ss.Name
,ss.Payload
,case when statusdescription = 'Bad Request' then 'Not Resolved' Else 'Resolved' End as [Error Status]
,case when
[Error Status] = 'Not Resolved' --Invalid Column issue occurring with [Error Status] here
then 'No Resolution' Else a.Date End as [Date],
,GETDATE() [Insert Date]
from #Errors a
join Table1 ss on a.id = ss.Id and a.Date = ss.Date
order by a.Date desc
答案 0 :(得分:1)
我会将第一个case表达式嵌套在第二个case表达式中。
select
a.ID
,ss.Date
,ss.Name
,ss.Payload
,case when statusdescription = 'Bad Request' then 'Not Resolved' Else 'Resolved' End as [Error Status]
,case when
case when statusdescription = 'Bad Request' then 'Not Resolved' Else 'Resolved' End = 'Not Resolved' --Invalid Column issue occurring with [Error Status] here
then 'No Resolution' Else a.Date End as [Date],
,GETDATE() [Insert Date]
from #Errors a
join Table1 ss on a.id = ss.Id and a.Date = ss.Date
order by a.Date desc
答案 1 :(得分:0)
在第二个CASE
表达式中,您可以再次检查statusdescription
的值:
SELECT
a.ID,
ss.Date,
ss.Name,
ss.Payload,
CASE WHEN statusdescription = 'Bad Request'
THEN 'Not Resolved' ELSE 'Resolved' END AS [Error Status],
CASE WHEN statusdescription = 'Bad Request'
THEN 'No Resolution' ELSE a.Date END AS [Date],
GETDATE() AS [Insert Date]
FROM #Errors a
INNER JOIN Table1 ss
ON a.id = ss.Id AND
a.Date = ss.Date
ORDER BY a.Date DESC
请注意,如果此查询未运行,您可能需要将a.Date
转换为第二个CASE
表达式中的文本。