请问，我想做一些case when的操作，需要怎么实现？

 

    CASE
        WHEN score >= 90 THEN '90-100'
        WHEN score >= 80 THEN '80-89'
        WHEN score >= 70 THEN '70-79'
        WHEN score >= 60 THEN '60-69'
        ELSE '0-59'
    END AS score_range,
    COUNT(*) AS student_count
FROM
    students
GROUP BY
    score_range;

可以用条件标签列