从SQL表捕获每台计算机的最大值

Question

需要拉动每台计算机按特定任务序列执行的最后一步

编写一个SQL查询，以查询特定任务序列的计算机状态以及在任务序列运行期间执行的所有步骤。但是它显示了机器执行的所有步骤，而我的实际要求是为每台机器获得最后一步。

Netbios_Name0   Step    ActionName  Last Status
Computer1   0     xyx             Failed
Computer1   1     xyz             Success
Computer1   2     yyy            Inprogres
Computer2   0     xzz             Waiting
Computer2   1     xxy             Failed
Computer3   0     xyz             Failed
Computer3   1     xxx            Accepted
Computer3   2     xzy             Failed
Computer3   3     xzz            Success

Select Netbios_name0
,Step
,ActionName
,Laststatus
from [v_R_System] System
join [vSMS_TaskSequenceExecutionStatus] TaskSequence 
On TaskSequence.ResourceID = System.ResourceID
where packageID like '%PackageID%'

预期结果就像

Netbios_Name0   Step    ActionName  Last Status
Computer1   2   yyy          Inprogres
Computer2   1   xxy           Failed
Computer3   3   xzz           Success

Answer 1

如果您有可用的窗口功能...

select Netbios_Name0,Step,ActionName,Last Status
from
  (
  select t1.*, row_number() over (partition by Netbios_name0 order by Step desc) as rn
  from MyTable t1
  ) x2
where x2.rn = 1