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SELECT
CASE
WHEN g.grade < 8 THEN NULL
ELSE s.name
END AS name,
g.grade,
s.marks
FROM students s
JOIN grades g
ON s.marks BETWEEN g.min_mark AND g.max_mark
ORDER BY
g.grade DESC,
CASE
WHEN g.grade < 8 THEN s.marks
ELSE s.name
END;
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SELECT CASE WHEN g.grade < 8 THEN NULL ELSE s.name END AS name, g.grade, s.marks FROM students s JOIN grades g ON s.marks BETWEEN g.min_mark AND g.max_mark ORDER BY g.grade DESC, CASE WHEN g.grade < 8 THEN s.marks ELSE s.name END;