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SELECT
CASE
WHEN g.grade < 8 THEN null ELSE s.name END ,
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, s.name ASC;
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SELECT CASE WHEN g.grade < 8 THEN null ELSE s.name END , 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, s.name ASC;