Get value between from to dataset columns ssrs

Question

I have a data set like that:

Data Set Contents

From  To Comment 
----+---+-------- 
0    50   Bad 

50   70   Good 

70   100  Excellent 

If I have a value of 75, I need to get Excellent by searching the Dataset. I know about the lookup function but it is not what I want. How can I do that? The values should be in percentage.

Note : the value (75) is Average of a column (Calculated) it calculate student grade from max and student mark Version SQL Server 2016

Note 2 : the dataset is from database not static values

Thank You

Answer 1

Assuming you only ever have a fixed number of 'grades' then this will work. However, I would strongly recommend doing this type of work on the server where possible.

Here we go...

I created two datasets dsGradeRange with the following sql to recreate your example (more or less)

DECLARE @t TABLE (low int, high int, comment varchar(20))

INSERT INTO @t VALUES
(0,49,'Bad'),
(50,69,'Good'),
(70,100, 'Excellent')

SELECT * FROM @t

dsRandomNumbers This just creates 30 random numbers between 0 and 100

SELECT * 
    FROM (SELECT top 30 ABS(CHECKSUM(NEWID()) % 100) as myNumber FROM sys.objects) x
    ORDER BY myNumber

I added a table to the report to show the grades (just for reference).

I then added a table to show the dsRandomNumbers

Finally I set the expression of the 2nd column to the following expression.

=SWITCH
    (
        Fields!myNumber.Value < LOOKUP("Bad", Fields!comment.Value, Fields!high.Value, "dsGradeRange"), "Bad",
        Fields!myNumber.Value < LOOKUP("Good", Fields!comment.Value, Fields!high.Value, "dsGradeRange"), "Good",
        True, "Excellent"
    )

This gives the following results

As you can see we only need to compare to the high value of each case, the first match will return the correct comment.

Answer 2

Right click on your dataset and add a calculated field. Go to Field Properties > Fields > Add and add the following expression, which descripes your scenario:

=IIF(Fields!Number.Value < 50, "Bad", "Good")