How to query SQL Table and remove duplicate rows from a result set

Question

I know this is simple...

Please advise on how I can get a result set of rows 1, 9, 18, and 21 (based on the attached image)??

Thanks,

Brad

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Answer 1

If the rows are truly distinct across every column, then you can use SELECT DISTINCT.

Since you are using SQL Server you can also use row_number() to return one row for each ThreatId:

select ThreatId,
  ThreatTopClient,
  ...
from
(
  select ThreatId,
    ThreatTopClient,
    ...,
    row_number() over(partition by ThreatId order by ThreatMLSeq) rn
  from xThreatCA
  where ThreatMLSeq <> N'' 
    and ID <> 0
) d
where rn = 1
order by ThreatMLSeq