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Editorial Team
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Asked: 2026-06-03T06:40:09+00:00

I am trying to do something like this, and I’m not sure if it’s

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I am trying to do something like this, and I’m not sure if it’s possible using a simple GROUP BY:

SELECT GD.GradebookDetailId, G.SubjectCode, G.Description, G.UnitsAcademic, G.UnitsNonAcademic, 
GD.Grade, GD.Remarks, G.FacultyName, STR_TO_DATE(G.DateApproved, '%m/%d/%Y %h:%i:%s') AS 'DateAproved'

FROM gradebookdetail GD 
INNER JOIN gradebook G ON GD.GradebookId=G.GradebookId 
WHERE G.DateApproved IS NOT NULL AND G.GradebookType='final' AND StudentIdNumber='2012-12345'

GROUP BY ???????
ORDER BY G.SubjectCode ASC

So when I have a table like this:

Student: 2012-12345

SubjectCode | Grade | DateApproved
SUBJ123 | 2.00 | 1/4/2012
SUBJ123 | 1.75 | 1/5/2012
SUBJ987 | 1.50 | 1/5/2012

It will should look like this:

Student: 2012-12345

SubjectCode | Grade | DateApproved
SUBJ123 | 1.75 | 1/5/2012
SUBJ987 | 1.50 | 1/5/2012

EDIT: Here’s the solution:

SELECT 
    GD.GradebookDetailId, 
    G.SubjectCode, 
    G.Description, 
    G.UnitsAcademic, 
    G.UnitsNonAcademic, 
    GD.Grade, 
    GD.Remarks, 
    G.FacultyName, 
    STR_TO_DATE(G.DateApproved, '%m/%d/%Y %h:%i:%s') AS 'DateAproved'
FROM 
    gradebookdetail GD INNER JOIN 
    gradebook G ON GD.GradebookId=G.GradebookId 
WHERE 
    G.DateApproved IS NOT NULL AND 
    G.GradebookType='final' AND 
    StudentIdNumber='2011-10172' AND 
    NOT EXISTS (
        SELECT 1 FROM gradebook G2 INNER JOIN gradebookdetail GD2 ON G2.GradebookId=GD2.GradebookId
        WHERE 
            G2.GradebookType = 'final' AND 
            G2.DateApproved IS NOT NULL AND 
            GD2.StudentIdNumber = GD.StudentIdNumber AND 
            G2.SubjectCode = G.SubjectCode AND
            G2.DateApproved > G.DateApproved
    )
ORDER BY G.SubjectCode ASC
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1 Answer

  1. Editorial Team

    I think this query will do what you want, but I haven’t tested it. So let me know if something is wrong with it.

    SELECT 
    GD.GradebookDetailId, 
    G.SubjectCode, 
    G.Description, 
    G.UnitsAcademic, 
    G.UnitsNonAcademic, 
    GD.Grade, 
    GD.Remarks, 
    G.FacultyName, 
    STR_TO_DATE(G.DateApproved, '%m/%d/%Y %h:%i:%s') AS 'DateAproved'
FROM 
    gradebookdetail GD INNER JOIN 
    gradebook G ON GD.GradebookId=G.GradebookId 
WHERE 
    G.DateApproved IS NOT NULL AND 
    G.GradebookType='final' AND 
    StudentIdNumber='2012-12345' AND 
    NOT EXISTS (
        SELECT 1 FROM gradebook G2 
        WHERE 
            G2.GradebookType = 'final' AND 
            G2.DateApproved IS NOT NULL AND 
            G2.StudentIdNumber = G.StudentIdNumber AND 
            G2.StudentCode = G.SubjectCode AND
            G2.DateApproved > G.DateApproved
    )
ORDER BY G.SubjectCode ASC
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