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SELECT IF(g.grade < 8, NULL, s.name), g.grade, s.marks
FROM students s
LEFT 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.name END ASC,
CASE WHEN g.grade < 8 THEN s.marks END ASC;
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SELECT IF(g.grade < 8, NULL, s.name), g.grade, s.marks FROM students s LEFT 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.name END ASC, CASE WHEN g.grade < 8 THEN s.marks END ASC;