Question

我正在尝试编写一个CASE语句，它将为每个资产提供一个独特的价值。下面的代码执行时没有错误，但如果资产通过和失败，则写入每个结果。我每个资产只需要一个不同的结果，它基于CASE声明。

以下是查询的当前表单

的示例结果

ServerID    IP  HOSTNAME    CARS_SubBusiness    STATUS  Technology  FailureReason
20979   1.1.1.1 myhost1      Business1          PASSED   Windows       -
20979   1.1.1.1 myhost1      Business1          FAILED   UNIX         Unable to complete Unix login

在这种情况下，我只需要返回PASSED结果。

Exclusion + * = Exclusion
Pass + * = Pass
FAIL + Not Attempted/No Results = FAIL
Not Attempted = Not Attempted
No Results = No Results

如果它通过并且失败我只需要传递信息，如果它被排除但有任何其他状态我只需要排除作为状态等等。

SELECT  auth.ServerID, auth.IP, auth.HOSTNAME, auth.CARS_SubBusiness, 

    CASE MAX (CASE
                (CASE
                    (CASE WHEN [Status] LIKE 'PASSED' AND ExclusionType IS NOT NULL 
                        THEN 6 WHEN [Status] LIKE 'FAILED' AND ExclusionType IS NOT NULL THEN 6 WHEN [STATUS] LIKE 'Not Attempted' AND ExclusionType IS NOT NULL 
                        THEN 6 WHEN [Status] LIKE 'PASSED' AND ExclusionType IS NULL THEN 5 WHEN [Status] LIKE 'FAILED' AND ExclusionType IS NULL 
                        THEN 4 WHEN [STATUS] LIKE 'Not Attempted' AND ExclusionType IS NULL THEN 3 ELSE 0 END) 
                 WHEN 6 THEN 'Excluded' WHEN 5 THEN 'PASSED' WHEN 4 THEN 'FAILED' WHEN 3 THEN 'Not Attempted' ELSE 'No Results' END) 
            WHEN 'Excluded' THEN 5
            WHEN 'Not Attempted' THEN 4
            WHEN 'No Results' THEN 3
            WHEN 'PASSED' then 2
            WHEN 'FAILED' then 1 END) 
                      WHEN 5 THEN 'EXCLUDED' 
                      WHEN 4 THEN 'Not Attempted'
                      WHEN 3 THEN 'No Results'
                      WHEN 2 THEN 'PASSED'
                      WHEN 1 THEN 'FAILED'
                      END AS [STATUS], auth.Technology, 
                      auth.FailureReason
    FROM     _CombinedAuthentication AS auth RIGHT OUTER JOIN
                      BusinessTranslations AS bt ON auth.BusinessID = bt.BusinessID
    WHERE  (auth.ActiveFlag IS NOT NULL)
    GROUP BY auth.ServerID, auth.IP,auth.CARS_SubBusiness,  auth.HOSTNAME, auth.Technology, auth.FailureReason

Answer 1

您可能需要考虑使用集合，如下所示：

select auth.ServerID, auth.IP,auth.CARS_SubBusiness,  auth.HOSTNAME, auth.Technology, auth.FailureReason,status
from bla where status='exclusion'
union
select auth.ServerID, auth.IP,auth.CARS_SubBusiness,  auth.HOSTNAME, auth.Technology, auth.FailureReason,status
from bla where status='pass' and not exists (select 1 from bla where status='exclusion' and...)
union
select auth.ServerID, auth.IP,auth.CARS_SubBusiness,  auth.HOSTNAME, auth.Technology, auth.FailureReason,status
from bla where status='fail' and not exists (select 1 from bla where status='exclusion' and ...) 
                             and not exists (select 1 from bla where status='pass' and ...) 
union
select auth.ServerID, auth.IP,auth.CARS_SubBusiness,  auth.HOSTNAME, auth.Technology, auth.FailureReason,status
from bla where status='Not Attempted' and not exists (select 1 from bla where status='exclusion' and ...) 
                                      and not exists (select 1 from bla where status='pass' and ...) 
                                      and not exists (select 1 from bla where status='fail' and ..) 
union
select auth.ServerID, auth.IP,auth.CARS_SubBusiness,  auth.HOSTNAME, auth.Technology, auth.FailureReason,status
from bla where status='No Result' and not exists (select 1 from bla where status='exclusion' and ...) 
                                  and not exists (select 1 from bla where status='pass' and ...) 
                                  and not exists (select 1 from bla where status='fail' and ..) 
                                  and not exists (select 1 from bla where status='Not Attempted' and ..)

这个解决方案也可以使用CTE进行改进

TSQL嵌套CASE与条件

1 个答案: