目录
0 问题描述【小红书面试题】
1 数据准备
2 问题分析
3 小结
0 问题描述【小红书】
有如下需求，需要将左边的表变换成右边的表，注意字段内容的顺序及对应内容的一致性。
第一个字段为name,第二个字段为subject，第三个字段为score，变换后要求subject按照语文、数学、英语排列，且score和subject之间内容保持一一对应。
1 数据准备
with data as (
select '张三' as name , '数学' as subject , 80 as score union all
select '张三' as name , '英语' as subject , 82 as score union all
select '张三' as name , '语文' as subject , 95 as score union all
select '李四' as name , '数学' as subject , 90 as score union all
select '李四' as name , '英语' as subject , 93 as score union all
select '李四
