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SELECT
CASE
WHEN marks >= 70 THEN name ELSE NULL END as name1,
CASE
WHEN marks BETWEEN min_mark AND max_mark THEN grade END as grade
,marks
FROM students
JOIN grades ON marks BETWEEN min_mark AND max_mark
order by grade desc,name asc,marks asc
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SELECT CASE WHEN marks >= 70 THEN name ELSE NULL END as name1, CASE WHEN marks BETWEEN min_mark AND max_mark THEN grade END as grade ,marks FROM students JOIN grades ON marks BETWEEN min_mark AND max_mark order by grade desc,name asc,marks asc