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我遇到了较大查询的一部分问题。我需要在今年年底获得学生最近的GPA。这取决于他们上课的最近学期。 GPA通过术语摘要存储在数据库中,而不是滚动式GPA。我在为每个学生抓取最近的学期入学条款方面存在问题。我的查询在下方,我需要知道如何拉最近的gpa,但每个学生最近一次参加该学年。仅供参考我正在使用SQL Server。按学生最近学期查询ID#和GPA
SELECT s.id,
Max (t.terms),
Max(t.gpa),
Sum(s.credits) AS systemCredits,
Sum(s2.credits) AS DegreeCredits,
Sum (s3.credits) AS trans_in
FROM (SELECT *
FROM student_courses
WHERE (course_code IN ('a', 'b', 'c'))
AND grade IN ('a', 'b', 'c')) s
FULL OUTER JOIN (SELECT *
FROM student_crs_hist
WHERE (course_code IN ('a', 'b', 'c'))
AND grade IN ('a', 'b', 'c')) s2
ON s.id = s2.id
AND s.years = s2.years
AND s.terms = s2.terms
JOIN (SELECT *
FROM stud_term_sum_div
WHERE years = '2013'
AND terms = (SELECT Max(terms)
FROM term_sum
WHERE years = '2013')) t
ON s.id = t.id
GROUP BY s.id