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

EDIT: Be sure to test the performance of each solution. As pointed out in this question, the CTE method may outperform using ROW_NUMBER.

;with cteMaxDate as (
    select ldPart, max(ldDate) as MaxDate
        from inventoryReport
        group by ldPart
)
SELECT md.MaxDate, ir.ptProdLine, ir.inPart, ir.inSite, ir.inAbc, ir.ptUm, ir.inQtyOh + ir.inQtyNonet AS in_qty_oh, ir.inQtyAvail, ir.inQtyNonet, ir.ldCustConsignQty, ir.inSuppConsignQty
    FROM cteMaxDate md
        INNER JOIN inventoryReport ir
            on md.ldPart = ir.ldPart
                and md.MaxDate = ir.ldDate