Lookup values based solely on minumum value of range - sql

Question

I'm wanting to place values within a range given only a minimum value, similar to using a VLOOKUP/HLOOKUP in Excel using the "FALSE" criteron.
As seen below, TableScore lists the low-end cutpoints (CutpointVal) for a value to be assigned a specific number of points (the minimum value in a range). The below SQL code accomplishes this in two steps, with the first query generating a datasheet that includes a high value for each low value, thus creating a full range.
However, this is a somewhat clunky way of doing this, especially when trying to iterate this many times. The original table (TableScore) cannot be altered to include high values. Is there a way to accomplish a similar mechanism with only one query?
Main
ID Score
72625 2.5
78261 3.2
82766 4.7
58383 0.3
TableScore
CutpointVal Points
0 0
0.3 1
1.2 2
2.7 3
3.4 4
Upper and lower range query (RangeQry):
SELECT a.CutpointVal AS LowVal, Val(Nz((SELECT TOP 1 [CutpointVal]-0.001
FROM TableScore b
WHERE b.Points > a.Points
ORDER BY b.Points ASC),9999)) AS HighVal, a.Points
FROM TableScore AS a
ORDER BY a.Points;
Range assignment query:
SELECT Main.ID, Main.Score, RangeQry.LowVal, RangeQry.HighVal, RangeQry.Points AS PTS
FROM RangeQry, Main
WHERE (((Main.Score) Between [RangeQry].[LowVal] And [RangeQry].[HighVal]));
Desired output:
ID Score Points
72625 2.5 2
78261 3.2 3
82766 4.7 4
58383 0.3 1

Answer 1

Consider:
SELECT Main.ID, Main.Score, (
SELECT Max(Points) FROM TableScore WHERE CutpointVal<=Main.Score) AS Pts
FROM Main;
Or
SELECT Main.ID, Main.Score, (
SELECT TOP 1 Points FROM TableScore
WHERE CutpointVal <= Main.Score
ORDER BY Points DESC) AS Pts
FROM Main;
Or
SELECT Main.ID, Main.Score, DMax("Points","TableScore","CutpointVal<=" & [Score]) AS Pts
FROM Main;