SQL conundrum, how to select latest date for part, but only 1 row per part (unique)

Question

I am trying to wrap my head around this one this morning.

I am trying to show inventory status for parts (for our products) and this query only becomes

Answer 1

  SELECT *
  FROM   (SELECT i.*,
      ROW_NUMBER() OVER(PARTITION BY ldPart ORDER BY ldDate DESC) r
      FROM   inventoryReport i
      WHERE  ldPart in ('ABC123', 'BFD21', 'AA123', etc)
         )
  WHERE  r = 1